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 Solution Find (x^3-12*x^2-42)*(x^2+x-3)Solution:Your problem -> (x^3-12*x^2-42)*(x^2+x-3)(x3-12x2-42) (x2+x-3) = x3(x2+x-3) -12x2(x2+x-3) -42(x2+x-3) = x5 + x4 - 3x3 - 12x4 - 12x3 + 36x2 - 42x2 - 42x + 126 = x5 + x4 - 3x3 - 12x4 - 12x3 + 36x2 - 42x2 - 42x + 126 = x5 + x4 - 12x4 - 3x3 - 12x3 + 36x2 - 42x2 - 42x + 126 = x5 - 11x4 - 15x3 - 6x2 - 42x + 126 Solution provided by AtoZmath.com Any wrong solution, solution improvement, feedback then Submit Here Want to know about AtoZmath.com and me