multipling polynnomials 1. x(3x2-2x+1) 2. 2y(3y3+2y2-4) 3. 4d2(-2d3+5d2-6d+2) 4.(3x+1)(2x-5) 5.(2y+3)(y-5) 6. (6a-3)(4a-1) 7(b-8)(5b-2) simplify the expression 8. a(3a+1)+(a+1)(a-1) 9.(x+2)(x+5)-x(4x-1)

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