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 - Exercises - Page 521: 16

Answer

The equation has no real solutions.

Work Step by Step

$-3x^{2}+6x=4\implies 3x^{2}-6x+4=0$ Comparing $3x^{2}-6x+4=0$ with $ax^{2}+bx+c=0$, we get $a=3$, $b=-6$ and $c=4$. The quadratic formula is $x=\frac{-b \pm \sqrt {b^{2}-4ac}}{2a}$ Substituting the values, we get $x=\frac{-(-6) \pm \sqrt {(-6)^{2}-4(3)(4)}}{(2)(3)}=\frac{6\pm \sqrt {-12}}{6}$ As the square of a real number can never be negative, this equation has no real solutions.
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