Question

Solve the equation. If necessary, round your answer to the nearest tenth.



3x2 = 147


Question 2 options:


A. 4.1, –4.1



B. 7, –7



C. 24.5, –24.5



D. 49, –49

Answer 1

3x^2 = 147
divide both sides by 3
x^2 = 49
x^2 -49 = 0
(x-7)(x+7) =0
so,, x = 7 , -7
the answer is B