Zamień iloczyn na sumę: a) (2x-4)(5-8x)= b) 2(x-1)(y+2)-(x+2xy-4y+5)=

(2x - 4)(5 - 8x) = 10x - 16x² - 20 + 32x = 42x - 16x² - 20 2(x - 1)(y + 2) - (x + 2xy - 4y + 5) = 2(xy + 2x - y - 2) - (x + 2xy - 4y + 5) = = 2xy + 4x - 2y - 4 - x - 2xy + 4y - 5 = 3x + 2y - 9

a) (2x-4)(5-8x)=10x-16x²-20+32x=-16x²+42x-20 b) 2(x-1)(y+2)-(x+2xy-4y+5)=2(xy-2x-y-2)-x-2xy+4y-5=2xy-2y-4-x-2xy+4y-5=2y-x-4

Zamień sumę na iloczyn:   a) 2y(x+y)-y-x b) x(x-1)-2(1-x) c) [latex](x+y)^{2}[/latex] +2(x+y) d) [latex](x^{2}+y^{2})-x^{2}(x^{2}+y^{2})[/latex] e) a(a-1)-4(1-a) f) 3z(x-5)+(5-x) g) 3b(b-4)-(4-b) h) 5(x-7)+10y(7-x) i) 3(x+y)+([latex](x+y)^{2}[/latex]

Zamień sumę na iloczyn:   a) 2y(x+y)-y-x b) x(x-1)-2(1-x) c) [latex](x+y)^{2}[/latex] +2(x+y) d) [latex](x^{2}+y^{2})-x^{2}(x^{2}+y^{2})[/latex] e) a(a-1)-4(1-a) f) 3z(x-5)+(5-x) g) 3b(b-4)-(4-b) h) 5(x-7)+10y(7-x) i) 3(x+y)+([latex](x+y)^{2}[/la...