Question

X^2 = 81 solve equation for x

Answer 1

`\sf x^2=81`

We want to isolate 'x', to do this we have to get rid of the exponent of 2. The opposite of squaring a number is taking the square root. So we can take the square root of both sides to get rid of the exponent:


`\sf √(x^2)=√(81)`

The square root and exponent of 2 cancel out leaving us with just 'x', and the square root of 81 is 9:


`\sf x=\boxed{\sf 9}`