Question 1 Report
Factorize 9(x + y)2 - 4(x - y)2
Answer Details
9(x + y)2 - 4(x - y)2 Using difference of two squares which says a2 - b2 = (a + b)(a - b) = 9(x + y)2 - 4(x - y)2 = [3(x + y)]2 - [2(x - y)]-2 = [3(x + y) + 2(x - y) + 2(x - y)][3(x + y) - 2(x - y)] = [3x +3y + 2x - 2y][3x + 3y - 2x + 2y] = (5x + y)(x + 5y)
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