Question

If x2 - 4 = 45, then x could be equal to
9
3
5
-7
-4

Answer 1

Hi:))

x² - 4 = 45

X² = 45 + 4

X² = 49

√x² = √49

x = 7

Answer 2

`x^(2) - 4 = 45`


`x^(2)` = 45 + 4


`x^(2)` = 49


`\sqrt{ x^(2) } = √(49)`

x = 7