Question

What are the solutions to the quadric equation x^2-16=0

Answer 1

x=4, x=-4

Explanation:

x^2-16=0

Add 16 to both sides;

x^2-16+16=0+16

Simplify;

x^2=16

x=
`√(16)`, x
`-√(16)`

`√(16)`

=4

factor the number;16

`√(4^2)`

=
`√(4)`

-
`√(16)`

Factor the number 16;

`√(4^2)`

=-4