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Popular >

factor r^2-9

Solution

factor

r^{2} - 9

Solution

(r + 3) (r - 3)

Solution steps

r^{2} - 9

Rewrite

9

as

3^{2}

= r^{2} - 3^{2}

Apply Difference of Two Squares Formula:

x^{2} - y^{2} = (x + y) (x - y)

r^{2} - 3^{2} = (r + 3) (r - 3)

= (r + 3) (r - 3)

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simplify 8x-3x simplify

8 x - 3 x

Frequently Asked Questions (FAQ)

What is factor r^2-9 ?
The solution to factor r^2-9 is (r+3)(r-3)