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McGraw Hill Integrated II, 2012

MH

McGraw Hill Integrated II, 2012 View details

4. Special Products

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Exercise 34 Page 31

Recall the pattern for the square of a binomial.

4c^2-36cd+81d^2

Practice makes perfect

We can find the product of this expression using polynomial identities. In this case we have the square of a binomial.

(2c-9d)^2

ExpandNegPerfectSquare

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

(2c)^2-2(2c)(9d)+(9d)^2

Multiply

(2c)^2-36cd+(9d)^2

(a b)^m=a^m b^m

2^2c^2-36cd+9^2d^2

Calculate power

4c^2-36cd+81d^2

Subchapter links

Exercises p.30-33