Algebra Examples

Factor x^2-9
x2-9
Step 1
Rewrite 9 as 32.
x2-32
Step 2
Since both terms are perfect squares, factor using the difference of squares formula, a2-b2=(a+b)(a-b) where a=x and b=3.
(x+3)(x-3)
x2-9
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 [x2  12  π  xdx ]