Question

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

Answer 1

Answer:

C) x = -2

Step-by-step explanation:

Original equation:

$12+\sqrt{1-4x}=15$

subtract 12 from both sides:

$\implies \sqrt{1-4x}=3$

square both sides:

$\implies 1-4x=9$

subtract 1 from both sides:

$\implies -4x=8$

divide both sides by -4:

$\implies x=-2$

Answer 2

$\\ \tt\rightarrowtail 12+\sqrt{1-4x}=15$

$\\ \tt\rightarrowtail \sqrt{1-4x}=3$

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

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

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

$\\ \tt\rightarrowtail x=-2$