Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 9 - Quadratic Functions and Equations - Chapter Test - Page 593: 15


$x=-1, 3.3$

Work Step by Step

$-3x^2+7x=-10$ $-3x^2+7x+10=-10+10$ $-3x^2+7x+10=0$ $y=(-b±\sqrt {b^2-4ac})/2a$ $y=(-7±\sqrt {7^2-4*-3*10})/2*-3$ $y=(-7±\sqrt {49+120})/-6$$ $y=(-7±\sqrt {169})/-6$ $y=(-7+13)/-6$ or $y=(-7-13)/-6$ $y=(-7+13)/-6$ $y=6/-6 = -1$ $y=(-7-13)/-6$ $y=(-20)/-6$ $y=10/3 = 3.3$
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