Question

a) (x-5)²-3(x-1)(x+1)-(2x²-1)+x(2x-3)

b) (4+x)(4-x)-2x(1-3x)+2(x+2)²-4(x²-1)

c) (x-2)²+3(4-x)(x+4)-2(2x+1)²

Temat to wzory skróconego mnożenia

Daje najj .. ;)

Answer 1

a) x'-10x+25-3(x'-1)-2x'+1+2x'-3x=x'-10x+25-3x'+3-2x'+1+2x'-3x=x'-16x+29

 

b) 16-x'-2x+6x'+2(x'+4x+4)-4x'+4=16-x'-2x+6x'+2x'+8x+8-4x'+4=3x'+10x+28

 

c) x'-4x+4+3(16-x')-2(4x'+4x+1)=x'-4x+4+48-3x'-8x'-8x-2=-10x'-12x+50

LUB

    x'-4x+4+3(4x+16-x'-4x)-2(4x'+4x+1)=x'-4x+4+12x+48-3x'-12x-8x'-8x-2=-10x'-28x+50

 

pkt C nie jestem pewna

Answer 2

a)x²-10x+25-3(x²-1)-2x²+1+2x²-3x=x²-10x+25-3x²+3-2x²+1+2x²-3x=-2x²-13x+29
b) 16-x²-2x+6x²+2(x²+4x+4)-4x²+4=16-x²-2x+6x²+2x²+8x+8-4x²+4=
=3x²+6x+28
c)x²-2x+4+3(16-x²)-2(4x²+4x+1)=x²-2x+4+48-3x²-8x²-8x-2=
=-10x²-10x+50