Exercise 11 Page 539

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- 2 a b+ b^2 Let's use the above formula to simplify our expression!

( q- 1)^2

ExpandNegPerfectSquare

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

( q)^2- 2( q)( 1)+ 1^2

CalcPow

Calculate power

q^2-2(q)(1)+1

Multiply

Multiply

q^2-2q+1

Notice that the expression is already written in standard form, since the terms are arranged by degree in descending order.