Question

Doprowadź wyrażenia do najprostrzej postaci:

b)(x+y+1)(2x-y)+(-1)(x-1)(2x+3y)

c)-(x+5)(2x+y-3)+(4x-2y)(x-y+3)-(x^2+y^2)

d)(3x+y)(x-5y)-x(x+4y-1)-2x(x-9y)

e)3-(2+3x)(4x-9)+5-x)2x

f)2x(-x+7)-5(x+3)(6-4x)+(1-2x)(-1-x)

Proszę o pomc.

Answer 1

b] [x+y+1][2x-y]+[-1][x-1][2x+3y]=2x^-xy+2xy-y^+2x-y+[-x+1][2x+3y]=2x^-xy+2xy-y^+2x-y-2x^-3xy+2x+3y= -2xy-y^+4x+2y
c] -[x+5][2x+y-3]+[4x-2y][x-y+3]-[x^+y^]= -[2x^+xy-3x+10x+5y-15]+4x^-4xy+12x-2xy+2y^-6y-x^-y^=-2x^-xy+3x-10x-5y+15+4x^-4xy+12x-2xy+2y^-6y-x^-y^=x^-7xy+5x-11y+15+y^
d] [3x+y][x-5y]-x[x+4y-1]-2x[x-9y]=3x^-15xy+xy-5y^-2x^-4xy+x-2x^+18xy= -x^-5y^+x
e] 3-[2+3x][4x-9]+[5-x]2x=3-[8x-18+12x^-27x]+10x-2x^=3-8x+18-12x^+27x+10x-2x^=21+29x-14x^
f] 2x[-x+7]-5[x+3][6-4x]+[1-2x][-1-x]= -2x^+14x-5[6x-4x^+18-12x]+1-x+2x+2x^= -2x^+14x-30x+20x^-90+60x+1-x+2x+2x^=20x^+45x-89

 

mam nadzieje ze pomoglam

Answer 2

b) 2xy- y(do kwadratu) + 4x +3y