Chapter Test
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Recall the pattern for the square of a binomial.
q^2-2q+1
Recall that the square of a binomial with subtraction is the square of the first term, minus twice the product of the terms, plus the square of the last term.
(a-b)^2=a^2-2ab+b^2
Calculate power
Multiply
Notice that the expression is already written in standard form, since the terms are arranged by degree in descending order.