a)(x-4)(x-2)=x^2-2x-4x+8=x^2-6x+8
b)(3k-2)(k-4)=3k^2-12k-2k+8=3k^2-14k+8
C)(2m-1)(m+1)=2m^2+2m-1m-1=2m^2+1m-1
D)(6c+1)(c-1)=6c^2-6c+1c-1=6c^2-5c-1
e)(4-d)(2d+2)=8d+8-2d^2-2d=-2d^2+6d+8
A)(2b+a)(3-b)=6b-2b^2+3a-ab
b)(-x+3xy)(3-b)=-3x+xb+9xy-3xyb
C)(st-3)(5+st)=5st+st^2-15-3st=st^2+2st-15
…^2= do drugiej potęgi
