Question

If x powered by 2= 20 what is the value of x ?

Answer 1

x = ± 2
`√(5)`

Explanation:

Given

x² = 20 ( take the square root of both sides )

x = ±
`√(20)` = ±
`√(4(5))` = ±
`√(4)` ×
`√(5)` = ± 2
`√(5)`

Answer 2

x = 10

Explanation:

10^2= 20, therefore

X=10