factorise x²+x -(a+3)(a+4)
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Answer:
Step-by-step explanation:
x^2 + x -(a+3)(a+4)
= x^2 + (a+4-a-3)x - (a+3)(a+4)
= x^2 + (a+4)x -(a+3)x - (a+3)(a+4)
= x( x +(a+4)) - (a+3)(x + (a+4))
= (x-(a+3))(x+(a+4))
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