Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 8 - Section 8.6 - Further Graphing of Quadratic Functions - Exercise Set - Page 526: 51

Answer

Vertex: $(-1/2, -25/4)$ Opens upward x-intercepts: -3, 2 y-intercept: -6

Work Step by Step

$f(x)=x^2+x-6$ Vertex: $-b/2a=x$ $x=-(1)/2*1$ $x=-1/2$ $f(x)=x^2+x-6$ $f(-1/2)=(-1/2)^2+(-1/2)-6$ $f(-1/2)=1/4-1/2-6$ $f(-1/2)=-25/4$ Vertex: $(-1/2, -25/4)$ Opens upward $x=0$ $f(x)=x^2+x-6$ $f(0)=0^2+0-6$ $f(0)=0+0-6$ $f(0)=-6$ $y=0$ $f(x)=x^2+x-6$ $0=x^2+x-6$ $0=(x+3)(x-2)$ $x+3=0$ $x+3-3=0-3$ $x=-3$ $x-2=0$ $x-2+2=0+2$ $x=2$ x-intercepts: -3, 2 y-intercept: -6
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