Oblicz: a) (x +3)*(x-2)+(x-1)*(x+5) b)(2x - 1) * (3x - 4) - (x +2 )*(1-2x)
a) x^2+3x-2x-6+x^2-x+5x-5=2x^2-3x-11
b)6x^2-3x-8x+4-x+2x^2-2+4x=8x^2-8x+2
a) (x+3)*(x-2)+(x-1)*(x+5)=x²-2x+3x-6+x²+5x-x-5=2x²+5x-11
b) (2x-1)*(3x-4)-(x+2)*(1-2x)=6x²-8x-3x+4-(x-2x²+2-4x)=6x²-8x-3x+4-x+2x²-2+4x=8x²-8x+2
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a) x^2+3x-2x-6+x^2-x+5x-5=2x^2-3x-11
b)6x^2-3x-8x+4-x+2x^2-2+4x=8x^2-8x+2
a) (x+3)*(x-2)+(x-1)*(x+5)=x²-2x+3x-6+x²+5x-x-5=2x²+5x-11
b) (2x-1)*(3x-4)-(x+2)*(1-2x)=6x²-8x-3x+4-(x-2x²+2-4x)=6x²-8x-3x+4-x+2x²-2+4x=8x²-8x+2