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: 10

Answer

The graph of $y=-x^2+x-6$ has no $x-$intercepts.

Work Step by Step

The given function is $\Rightarrow y=-x^2+x-6$ Find the number of real solutions of $0=-x^2+x-6$ $= b^2-4ac$ Substitute $-1$ for $a,1$ for $b,$ and $-6$ for $c$. $= (1)^2-4(-1)(-6)$ Simplify. $= 1-24$ Subtract. $= -23$ Discriminant is less than $0$, Hence, the equation has no real solutions. The graph of $y=-x^2+x-6$ has no $x-$intercepts.
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