a) (3x-5y)razy(-x+y)= b) (-x-y)razy(2x+3y)= c) (x-1)do kwadratu+(x+2)razy(x+2)=x do kwadratu +(x+2)do kwadratu d) (x-3)do kwadratu +2(x+6)=(x+3)do kwadratu +2

a) (3x-5y)*(-x+y)= -3x²+ 3xy + 5xy - 5y²= -3x²+ 8xy - 5y² b) (-x-y)*(2x+3y)= -2x² - 3xy - 2xy - 3y² = -2x² - 5xy - 3y² c) (x-1)² +(x+2)*(x+2)=x² +(x+2)² x²-2x +1 + x² + 4x + 4 = x² + x² + 4x +4 2x²-2x² +2x - 4x = -1-4+4 -2x = -1|: (-2) x = ½ d) (x-3)²+2(x+6)=(x+3)²+2 x²-6x +9 +2x +12 = x² + 6x +9 + 2 x²-x² -6x + 2x - 6x = -12 -9 +9 +2 -10x = -10 |:(-10) x =1