Question

What is the solution to the equation below. 12 + square root 1 - 4x = 15

Answer 1

`\\ \tt\rightarrowtail 12+√(1-4x)=15`

`\\ \tt\rightarrowtail √(1-4x)=3`

`\\ \tt\rightarrowtail 1-4x=3^2`

`\\ \tt\rightarrowtail 1-4x=9`

`\\ \tt\rightarrowtail -4x=8`

`\\ \tt\rightarrowtail x=-2`

Answer 2

C) x = -2

Explanation:

Original equation:

`12+√(1-4x)=15\\`

subtract 12 from both sides:

`\implies √(1-4x)=3`

square both sides:

`\implies 1-4x=9`

subtract 1 from both sides:

`\implies -4x=8`

divide both sides by -4:

`\implies x=-2`