a) 7ײ-4×-6ײ+4-ײ+5×= ? b) -2(3a-2b)-4a²(2-3a+2b)=? c) (4-×)(2×+5)-4=? d) (4-2×)(3×-3)-2×(3×+1)=?

a) 7ײ-4×-6ײ+4-ײ+5×= 1x + 4 b) -2(3a-2b)-4a²(2-3a+2b)= -6a+4b-8a2+12a3-4a2b c) (4-×)(2×+5)-4= 8x+20-2x2-5x=3x+20-2x2 d) (4-2×)(3×-3)-2×(3×+1)=12x-12-6x2+6x-6x2-2x=16x-12-12x2

a) 7ײ-4×-6ײ+4-ײ+5×= x +4 b) -2(3a-2b)-4 a²(2-3a+2b)=-6a+4b-8a²12a³-8a²b c) (4-×)(2×+5)-4=-2x²+3x+16 d) (4-2×)(3×-3)-2×(3×+1)=-12x²+16x -12

a=x+4 b=-6a+4b-8a2 + 12a3 - 8ba2 c-nie wiem;( d tak samo:(