Question

What is the value of x in the following equation? x2 - 1 = 8

Answer 1

4.5

Explanation:

First break it apart by taking the x2 and set it aside then add 8 + 1 which is 9.

Next take the 9 and divide it by 2 then you get 4.5.

To double check make sure to multiply 4.5 by 2 just to make sure it gets 9 as the answer.

Answer 2

4.5

Explanation:

if we take -1 and put it in L.H.S it becomes 8+1=9 and then when u put x2 which is x×2 to L.H.S it becomes 9÷2 =4.5