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How do you multiply #(k-7)^2#?

1 Answer

Dec 15, 2015

#k^2 - 14k + 49#

Explanation:

To square a binomial, use this formula:

#(a+b)^2 = a^2 + 2ab + b^2#

In this case:

#(k-7)^2 = (k)^2 + 2(k)(-7) + (-7)^2 = k^2 - 14k + 49#

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