factor the equation: 9m^2-(m-2)^2

Algebra
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Oct 9th, 2015

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9m^2-(m-2)^2

(3m)^2 - (m-2)^2                           Hint: write 9 = 3^2

(3m+m-2) (3m-(m-2))                   Hint: use formula a^2 - b^2 = (a+b)(a-b)

(4m-2) (3m-m+2)

(4m-2) (2m+2)

Hence the factors are (4m-2) (2m+2)

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Oct 9th, 2015

how dod you get the 3m from the 9m

Oct 9th, 2015

it was given 9m^2,

9 = 3X3 = 3^2

so 9m^2 = 3^2 m^2 = (3m)^2

Oct 9th, 2015

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