Algebra 2 Common Core

Published by Prentice Hall
ISBN 10: 0133186024
ISBN 13: 978-0-13318-602-4

Chapter 4 - Quadratic Functions and Equations - 4-7 The Quadratic Formula - Lesson Check - Page 244: 4

Answer

no real solutions

Work Step by Step

In the given equation, \begin{align*} 3x^2-4x+3=0 ,\end{align*} $a= 3 ,$ $b= -4 ,$ and $c= 3 .$ Using the Quadratic Formula which is given by $x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a},$ then \begin{align*}\require{cancel}x&= \dfrac{-(-4)\pm\sqrt{(-4)^2-4(3)(3)}}{2(3)} \\\\&= \dfrac{4\pm\sqrt{16-36}}{6} \\\\&= \dfrac{4\pm\sqrt{-20}}{6} \\\\&= \dfrac{4\pm\sqrt{4\cdot-5}}{6} \\\\&= \dfrac{4\pm\sqrt{(2)^2\cdot-5}}{6} \\\\&= \dfrac{4\pm2\sqrt{-5}}{6} .\end{align*} Since the radicand of the square root symbol is negative, then there are no real solutions.
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