Question 206551
factor this equation. Thank you.

(a+4)^2-2(a+4)+1
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Let x = a+4
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Substitute:
x^2 -2x + 1
Factor:
(x-1)(x-1)
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Substitute:
(a+4-1)(a+4-1)
= (a+3)(a+3)
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Cheers,
Stan H.