factorise 5(x+y)-15(x+y)^2
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Answer:
5 ( x+y ) (1 - 3x - 3y)
Step-by-step explanation:
5(x+y) - 15(x+y)²
= 1*5(x+y) - 3*5(x+y)(x+y)
= 5(x+y)(1-3(x+y))
= 5 ( x+y ) (1 - 3x - 3y)
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