Question

Solve the following problems using special product. SHOW YOUR SOLUTION.

2.) What is the area of a rectangle if its length measures (10y+4w)cm and its with measures (10y-4w)cm.
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Answer 1

`a = l * w \\ a = (10y + 4w)(10y - 4w) \\ a = 10y(10y - 4w) + 4w(10y - 4w) \\ a = 100 {y}^(2) - 40wy + 40wy - 16 {w}^(2) \\ a = 100 {y}^(2) - 16 {w}^(2)`

ATTACHED IS THE SOLUTION