Question

Solve the following equation for all solutions of x.
4x(squared) - 49 = 0

A. x=-2/7, 2/7
B. x= 0, 7/2
C. x= -7/2, 7/2
D. x= -7/2

Answer 1

4x^2 - 49=0
(2x)^2 - 7^2 =0
(2x-7)(2x+7)=0
x= 7/2 , x= -7/2

Answer 2

C

Answer 3

But I don't understand how you got the answer from (2x - 7)(2x + 7) = 0.

Answer 4

2x+7=0 OR 2x-7=0
=> x=-7/2 => x=7/2

Answer 5

Oh, I see.....

Answer 6

thanks

Answer 7

my pleasure XD