Question

How do you simplify `(10x + 3)(10x - 3)`?

Answer 1

See a solution process below:

Explanation:

This is a special form for factoring a quadratic. The formula is:

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

Substituting `10x` for `a` and `3` for `b` gives:

`(10x + 3)(10x - 3) => (10x)^2 - 3^2 => 100x^2 - 9`