Question

x2 – 49 = 0

Answer 1

Isolate x by adding 49 to both sides and then dividing both sides by 2.

Answer 2

Wait, excuse me, that's a x^2?

Answer 3

It must be. In that case you would add 49 to both sides and then square root both sides.
x^2 - 49 = 0
x^2 = 49 <-- add 49 to both sides
x = 7 <--square root both sides

Answer 4

So x = 7. You can check your work by plugin 7 in for x.
x^2 - 49 = 0
7^2 - 49 = 0
49 - 49 = 0
0 = 0
True.

Answer 5

remember to use both positive and negative values when taking sq rt
rt 49 = +/-7
factor as difference of 2 squares
(x+7)(x-7)=0

Answer 6

@ardilla when writing exponent you can use the ^ symbol by using " Shift 6 "