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a(2ab + b) -b (a - 2ab + a ²) = 2a²b +ab - ab +2ab²-a²b =
= a²b+2ab² = (0,1)² * (-10) + 2*(0,1) *(-10)² = -0,01 *10 +0,2*100=
= -0,1 +20=19,9