Factorise 3x^2 - 5x -12
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Answer:
=3x^2-9x+4x-12=0
=3x(x-3) +4(x-3)=0
=(x-3)(3x+4)=0
=x-3=0, 3x+4=0
= x=3, x=-4/3
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Answer:
3x^2 + 4x - 9x - 12
x(3x+4) -3 ( 3x+4)
(x-3) (3x+4)
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