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McGraw Hill Integrated II, 2012 View details

8. Differences of Squares

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Exercise 85 Page 63

Use the polynomial identities to expand the square of a binomial.

x^2-4x+4

Practice makes perfect

We can find the product of this expression using polynomial identities. Let's start by rewriting the expression as a square of a binomial. (x-2)(x-2)=(x-2)^2 Now, we have the square of a binomial. Let's expand it!

(x-2)^2

ExpandNegPerfectSquare

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

x^2-2 * x * 2+2^2

CalcPow

Calculate power

x^2-2 * x * 2+4

Multiply

x^2-4x+4

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Exercises p.60-63

Exercise 85 Page 63

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