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Anna007 [38]
3 years ago
15

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

nt.​
Mathematics
1 answer:
Ira Lisetskai [31]3 years ago
7 0

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

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