What are the solutions to the equation ( 5 x − 15 ) 2 = − 100 ?

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Dmw asked Jun 16, 2022

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1 vote

What are the solutions to the equation ( 5 x − 15 ) 2 = − 100 ?

Mathematics
high-school

Dmw asked Jun 16, 2022

by Dmw

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2 Answers

11 votes

Answer:

x = -7

Explanation:

$\left(5x-15\right)\cdot \:2=-100\\\\(\left(5x-15\right)\cdot \:2)/(2)=(-100)/(2)\\5x-15=-50\\5x-15+15=-50+15\\5x=-35\\\\(5x)/(5)=(-35)/(5)\\\\x=-7$

Maxxxo answered Jun 18, 2022

by Maxxxo

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15 votes

Answer:

x = -7

Explanation:

( 5 x − 15 ) 2 = − 100

10x - 30 = - 100

10x = -70

x = -7

ADoN answered Jun 23, 2022

by ADoN

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