zapisz w prostszej postaci; a) 7xdo potegi 2 -4x-6x do potegi2 +4-x do potegi2 +5x= b) -2(3a-2b)-4a(2-3a+2b)= c) (4-x)(2x+5)-4= d) (4-2x)(3x-3)-2x(3x+1)=

a) 7x²-4x-6x²+4-x²+5x=x+4 b) -2(3a-2b)-4a(2-3a+2b)=(-6a)+4b+8a-8ab=2a+4b-8ab c)(4-x)(2x+5)-4=8x+20-2x²-5x=3x+20-2x² d) (4-2x)(3x-3)-2x(3x+1)= 12x-12-6x²+6x-6x²-2x=16x-12-12x²

a)=4+x b)=-6a+4b-8a+12a do 2 -8 ab=-14a+12a do 2 +4b-8ab c)=8x+20-2x do 2-5x-4=3x+16-2x do 2 d)=12x-12-6x do 2 +6x-6x do 2 -2x=-12+16x-12x do 2

a) 7x² -4x-6x² +4-x² +5x=x+4 b) -2(3a-2b)-4a(2-3a+2b)=-12a+4b+12a²-8ab c) (4-x)(2x+5)-4=8x-2x²-5x+20=-2x²+3x+20 d) (4-2x)(3x-3)-2x(3x+1)= 12x-12-6x²+6x-6x²-2x=-12x²+16x-12