Question

Solve by factoring:
a² = 25

Answer 1

a=+ or - 5 bc -5x-5 or 5x5 equals to 25

Answer 2

`a=` ±
`5`

Explanation:

`a^(2) =25`

equal to zero

`a^(2) -25=0`

factor: difference of squares

`(a+5)(a-5)=0`

first factor:

`a+5=0\\a_(1) =-5`

second factor:

`a-5=0\\a_(2) =5`

Hope this helps