Factorise 3x³+x²-38x+24
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Answer:
3x³+x²-38x+24
=3x³-9x²+10x²-30x-8x+24
=3x²(x-3)+10x(x-3)-8(x-3)
=(x-3)(3x²+10x-8)
=(x-3)(3x²-2x+12x-8)
=(x-3)(x(3x-2)+4(3x-2))
=(x-3)(3x-2)(x+4)
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