question no. 1.(x-3)(x-4)2(x-5)-6
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Answer:
(x^2-4x-3x+12)2x-10-6
(x^2-7x+12)2x-16
2x^3-16x^2-14x^2+112x+24x--192
2x3-28x2+136x-192
2(x3-14x2+63x-96)
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