wykonaj działania i przeprowadz redukcje wyrazow podobnych:a) (x2+4x-3)(5x-1)=b) (3x+y)2-2(x+y)(x-y) - 7xy=
10x^2-2x+20x^2-4x-15x+3=30x^2-21x+3=x(30x-21)+3
6x+2y-2(x^2-y^2)-7xy=6x+2y-2x^2+2y^2-7xy=2y(1+y)+2x(3-x)- 7xy
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10x^2-2x+20x^2-4x-15x+3=30x^2-21x+3=x(30x-21)+3
6x+2y-2(x^2-y^2)-7xy=6x+2y-2x^2+2y^2-7xy=2y(1+y)+2x(3-x)- 7xy