Question

What is the positive solution to this equation? 4x^2+ 12x = 135 Record your answer and fill in the bubbles on your answer document.​

Answer 1

Answer:

$\frac{9}{2} or 4.5$

Step-by-step explanation:

4x^2+ 12x = 135

D=b²−4ac=122−4(4)(−135)=144+2160=2304=48²

$x_{p}= \frac{-12+48}{8} =\frac{36}{8}=\frac{9}{2}=4.5$