Question

How do you factor `a^2 − 36`?

Answer 1

`a^2 - 36` can be written as `a^2 - 6^2`

this is of the form:

`a^2 - b^2 = ( a + b) (a -b )`

so ,
`a^2 - 6^2= (a +6) (a - 6)`

the factorized form of `a^2 - 36` is:

`(a +6) (a - 6)`