1. -2(2x+3)+3(2x-4)= -4x-6+6x-12=2x-18
2.2x^2+3x-x^2-2x=x(do kwadratu)+x
3. 3ab+2a+ab+3a= 4ab+5a
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1. -2(2x+3)+3(2x-4)= -4x-6+6x-12=2x-18
2.2x^2+3x-x^2-2x=x(do kwadratu)+x
3. 3ab+2a+ab+3a= 4ab+5a