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

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Answer 1 · 2017-05-31T12:43:00

See a solution process below:

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:

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

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