Odpowiedź:
Szczegółowe wyjaśnienie:
x*(-2)y*5xy = -10x²y²
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2(a+b) = 2a+2b
-5(x+4-y) = -5x-10-5y
2x(y-3)-2y(x-3) =2xy -6x-2xy+6=6 - 6x
8a+4b×4=8a+16b
7k−(m−2n+k)−(5k−3)+(2k−1)=7k-m+2n-k-5k+3+2k-1=3k- m+2n+2
(3x-4)(2x+5)=5x²+15x-8x-20=5x²+7x-20
(4x-2y)(x-3y+2)=4x²-12xy+8x-2xy+6y²-4y=10x²+6y²-14xy+8x-4y
(5-2x)(y+4x) – (2+3x)(4y-2x)=5y+20x-2xy-8x²-8y+4x-12xy+6x=30x -3y-8x²-14xy