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9x2 - 18xy + 9y2
9(x-y)(x-y)
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To factor a perfect square, it should be in the form a2+2ab+b2 For example: 9x2+18xy+9y2 First factor out the 9: 9(x2+2xy+y2) Make a2+2ab+b2 into (a+b)2 : 9(x+y)2
Factor: 9x2 - 25.
63
(4x + 3y)(4x + 3y) or (4x + 3y)2
9x2 + 9x - 10 =(3x - 2)(3x + 5)