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 9 - Solving Quadratic Equations - 9.5 - Solving Quadratic Equations Using the Quadratic Formula - Monitoring Progress - Page 519: 11

Answer

The graph of $y=x^2-x$ has two $x-$intercepts.

Work Step by Step

The given function is $\Rightarrow y=x^2-x$ Find the number of real solutions of $0=x^2-x$ $= b^2-4ac$ Substitute $1$ for $a,-1$ for $b,$ and $0$ for $c$. $= (-1)^2-4(1)(0)$ Simplify. $= 1-0$ Subtract. $= 1$ Discriminant is greater than $0$, Hence, the equation has two real solutions. The graph of $y=x^2-x$ has two $x-$intercepts.
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