Big Ideas Math - Algebra 1, A Common Core Curriculum

Published by Big Ideas Learning LLC
ISBN 10: 978-1-60840-838-2
ISBN 13: 978-1-60840-838-2

Chapter 7 - Polynomial Equations and Factoring - 7.4 - Solving Polynomial Equations in Factored Form - Exercises - Page 381: 3

Answer

$x=0$ and $x=-7$.

Work Step by Step

The given equation is $\Rightarrow x(x+7)=0$ Use zero-product property rule. $\Rightarrow x=0$ or $x+7=0$ Solve for $x$. $\Rightarrow x=0$ or $x=-7$ Check:- $x=0$ $\Rightarrow 0(0+7)=0$ $\Rightarrow 0(7)=0$ $\Rightarrow 0=0$ True. Check:- $x=-7$ $\Rightarrow -7(-7+7)=0$ $\Rightarrow -7(0)=0$ $\Rightarrow 0=0$ True. Hence, the solutions are $x=0$ and $x=-7$.
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