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A- x2 - 9 = (x + 3)(x - 3) ==> x - 3 3x+9 3(x + 3) 3 b- x2 + 6x +9 = (x+3)(x+3) ==> x + 3 ax+3a a(x+3) a c- 2x-10 = 2(x - 5 ) ==> 2 x2 - 10x +25 ( x - 5)(x - 5) (x - 5)
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A- x2 - 9 = (x + 3)(x - 3) ==> x - 3 3x+9 3(x + 3) 3 b- x2 + 6x +9 = (x+3)(x+3) ==> x + 3 ax+3a a(x+3) a c- 2x-10 = 2(x - 5 ) ==> 2 x2 - 10x +25 ( x - 5)(x - 5) (x - 5)