Factorise
1)- x^2+12x+27
2)- x^2-8x-65
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1. x²+12x+27
= x²+9x+3x+27
=x(x+9)+3(x+9)
=(x+9)(x+3)
2. x²-8x-65
= x²-13x+5x-65
= x(x-13)+5(x-13)
= (x-13)(x+5)
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