Factorise :
3x5 - 6x4 - 2x3 + 4x2 + x - 2
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= 3x4(x - 2) - 2x2(x - 2) + 1(x - 2)
= (x - 2)(3x4 - 2x2 + 1)
Hence,3x5 - 6x4 - 2x3 + 4x2 + x - 2 = (x - 2)(3x4 - 2x2 + 1)
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6xy(a2 + b2) + 8yz(a2 + b2) - 10xz(a2 + b2)
xy - ay - ax + a2 + bx - ab
-x2y - x + 3xy + 3
6a2 - 3a2b - bc2 + 2c2