Question

wykonaj mnożenie

a) (x+2)(x+1)=

b) (2a+1)(3-b)=

c) (a-1)(a do kwadratu - b do kwadratu)=

d) (2x-1)(y-3)=

e) (x-y)(a-b+9)=

Daję naj

Answer 1

a) (x+2)(x+1)= x^2+x+2x+2= x^2+3x+2

b) (2a+1)(3-b)=6a-2ab+3-b

c) (a-1)(a^2-b^2)=a^3-ab^2-a^2+b^2

d) (2x-1)(y-3)= 2xy-6x-y+3

e)  (x-y)(a-b+9)=ax-bx+9x-ay+bx-9y=ax-ay