Exercise 31 Page 31

Notice that the given expression is the multiplication of conjugates. This allows us to use a shorter method of multiplying the terms than the normal distribution process.

(3t+12)(3t-12)

ExpandDiffSquares

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

(3t)^2-12^2

PowProdII

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

3^2t^2-12^2

CalcPow

Calculate power

9t^2-144