2(x+3)(x+6)+3(x-2)(y+7)=
2(x+3)(x+6)+3(x-2)(y+7)= (2x+6)(x+6)+(3x-6)(y+7)= 2x^2+12x+6x+12x+3xy+21x-6y-42 = i tutaj wystarczy dodoac :)
(2x+6)(x+6)+(3x-6)(y+7)=2x²+6x+12x+36+3xy-6y+21x-42=2x²+39x-6y+3xy-6
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2(x+3)(x+6)+3(x-2)(y+7)= (2x+6)(x+6)+(3x-6)(y+7)= 2x^2+12x+6x+12x+3xy+21x-6y-42 = i tutaj wystarczy dodoac :)
(2x+6)(x+6)+(3x-6)(y+7)=2x²+6x+12x+36+3xy-6y+21x-42=
2x²+39x-6y+3xy-6