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2.5.1: Ejercicios 2.5

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    114001
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    Términos y Conceptos

    Ejercicio\(\PageIndex{1}\)

    ¿Cómo le ayudaría a graficarlo completar el cuadrado en una función cuadrática?

    Responder

    Después de completar el cuadrado, puede identificar rápidamente los cambios horizontales y verticales

    Ejercicio\(\PageIndex{2}\)

    Después de completar la plaza, obtienes\(f(x)=(x-2)^2+3\). Is \(x=2\) considered a root of \(f(x)\)? Explain.

    Responder

    \(x=2\) is not a root of \(f(x)\) because \(f(2)=3\), not \(0\).

    Ejercicio\(\PageIndex{3}\)

    Una de las variaciones al completar el cuadrado te da la forma\((cx+a)^2+b\). Does \(c\) represent a vertical stretch/shrink or a horizontal stretch/shrink of the function \(x^2\)?

    Responder

    Representa un estiro/encogimiento horizontal porque está en el interior de la función.

    Ejercicio\(\PageIndex{4}\)

    Después de completar la plaza obtienes eso\(g(t)=(t+2)^2-6\). What are the values of \(a\) and \(b\) if your goal form is \((x+a)^2+b\)?

    Responder

    \(a=2\) and \(b=-6\)

    Problemas

    En ejercicios\(\PageIndex{5}\) -\(\PageIndex{11}\), escribir cada función en la forma\((x+a)^{2}+b\) e identificar los valores de\(a\) y\(b\).

    Ejercicio\(\PageIndex{5}\)

    \(f(x)=x^2-4x+6\)

    Responder

    \(f(x)=(x-2)^2+2\); \(a=-2\); \(b=2\)

    Ejercicio\(\PageIndex{6}\)

    \(g(x)=x^2+20x+40\)

    Responder

    \(g(x)=(x+10)^2-60\); \(a=10\); \(b=-60\)

    Ejercicio\(\PageIndex{7}\)

    \(h(x)=x^2-8x+5\)

    Responder

    \(h(x)=(x-4)^2-11\); \(a=-4\); \(b=-11\)

    Ejercicio\(\PageIndex{8}\)

    \(m(x)=x^2-22x-4\)

    Responder

    \(m(x)=(x-11)^2-125\); \(a=-11\); \(b=-125\)

    Ejercicio\(\PageIndex{9}\)

    \(n(x)=x^2-6x-2\)

    Responder

    \(n(x)=(x-3)^2-11\); \(a=-3\); \(b=-11\)

    Ejercicio\(\PageIndex{10}\)

    \(p(x)=x^2+11x+4\)

    Responder

    \(p(x)=(x+\frac{11}{2})^2-\frac{105}{4}\); \(a=\frac{11}{2}\); \(b=-\frac{105}{4}\)

    Ejercicio\(\PageIndex{11}\)

    \(p(x)=x^2+13x\)

    Responder

    \(p(x)=(x+\frac{13}{2})^2-\frac{169}{4}\); \(a=\frac{13}{2}\); \(b=-\frac{169}{4}\)

    En ejercicios\(\PageIndex{12}\) -\(\PageIndex{16}\), escribir cada función en la forma\((cx+a)^{2}+b\) e identificar los valores de\(a,\: b,\) y\(c\).

    Ejercicio\(\PageIndex{12}\)

    \(f(x)=9x^2-12x+12\)

    Responder

    \(f(x)=(3x-2)^2+8\); \(a=-2\); \(b=8\); \(c=3\)

    Ejercicio\(\PageIndex{13}\)

    \(g(x)=x^2-2x+2\)

    Responder

    \(f(x)=(x-1)^2+1\); \(a=-1\); \(b=1\); \(c=1\)

    Ejercicio\(\PageIndex{14}\)

    \(h(x)=4x^2-4x-4\)

    Responder

    \(h(x)=(2x-1)^2-5\); \(a=-1\); \(b=-5\); \(c=2\)

    Ejercicio\(\PageIndex{15}\)

    \(w(x)=4x^2+4x+6\)

    Responder

    \(w(x)=(2x+1)^2+5\); \(a=1\); \(b=5\); \(c=2\)

    Ejercicio\(\PageIndex{16}\)

    \(y(x)=9x^2+18x+4\)

    Responder

    \(y(x)=(3x+3)^2-5\); \(a=3\); \(b=-5\); \(c=3\)

    En ejercicios\(\PageIndex{17}\) -\(\PageIndex{21}\), escribir cada función en la forma\(c(x+a)^{2}+b\) e identificar los valores de\(a,\: b,\) y\(c\).

    Ejercicio\(\PageIndex{17}\)

    \(f(x)=9x^2-12x+12\)

    Responder

    \(f(x)=9(x-\frac{2}{3})^2+8\); \(a=-\frac{2}{3}\); \(b=8\); \(c=9\)

    Ejercicio\(\PageIndex{18}\)

    \(g(x)=x^2-2x+2\)

    Responder

    \(f(x)=(x-1)^2+1\); \(a=-1\); \(b=1\); \(c=1\)

    Ejercicio\(\PageIndex{19}\)

    \(h(x)=4x^2-4x-4\)

    Responder

    \(h(x)=4(x-\frac{1}{2})^2-5\); \(a=-\frac{1}{2}\); \(b=-5\); \(c=4\)

    Ejercicio\(\PageIndex{20}\)

    \(w(x)=4x^2+4x+6\)

    Responder

    \(w(x)=4(x+\frac{1}{2})^2+5\); \(a=\frac{1}{2}\); \(b=5\); \(c=4\)

    Ejercicio\(\PageIndex{21}\)

    \(y(x)=9x^2+18x+4\)

    Responder

    \(y(x)=9(x+1)^2-5\); \(a=1\); \(b=-5\); \(c=9\)

    En ejercicios\(\PageIndex{22}\) -\(\PageIndex{25}\), completa el cuadrado y usa tu resultado para ayudarte a graficar la función.

    Ejercicio\(\PageIndex{22}\)

    \(f(t)=t^2+2t+3\)

    Responder

    \(f(t)=(t+1)^2 +2\);

    Ejercicio\(\PageIndex{23}\)

    \(p(q)=q^2 -\frac{2}{3}q\)

    Responder

    \(p(q)=(q-\frac{1}{3})^2 - \frac{1}{9}\);

    Ejercicio\(\PageIndex{24}\)

    \(y(x) = x^2+4x+2\)

    Responder

    \(y(x) = (x+2)^2-2\);

    Ejercicio\(\PageIndex{25}\)

    \(f(x) = x^2-4x+6\)

    Responder

    \(f(x) = (x-2)^2+2\);

    En ejercicios\(\PageIndex{26}\) -\(\PageIndex{29}\), ampliar y graficar la función.

    Ejercicio\(\PageIndex{26}\)

    \(f(x) = (x-1)^2-2\)

    Responder

    \(f(x) = x^2-2x-1\)

    Ejercicio\(\PageIndex{27}\)

    \(g(x) = -(x+3)^2+4\)

    Responder

    \(g(x) = -x^2-6x-5\)

    Ejercicio\(\PageIndex{28}\)

    \(h(x) = (-x+3)^2+4\)

    Responder

    \(h(x) = x^2-6x+13\)

    Ejercicio\(\PageIndex{29}\)

    \(x(y) = (y+2)^2-1\)

    Responder

    \(x(y) = y^2+4y+3\)


    2.5.1: Ejercicios 2.5 is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts.