Question

Zapisz w jak najprostrzej postaci:

a) 6a²-3c+2a²-5c-10a²+c

b)2(5x-7y)-(3y-7x)

c)(5+2x)(3x-2)

d)2x(4x-1)-(x-2)(x+2)

PROSZĘ O SZYBK ODP.DAJE NAJ

Answer 1

a) 6a²-3c+2a²-5c-10a²+c= -2a²-7c

b)2(5x-7y)-(3y-7x)= 10x-14y-3y+7x= 17x-17y= 17(x-y)

c)(5+2x)(3x-2)= 15x-10+6x-4x=17x-10

d)2x(4x-1)-(x-2)(x+2)= 8x²-2x-(x²+2x-2x-4)=8x²-2x-x²-2x+2x+4= 7x²+2x+4=2(3,5x²+x+2)

Answer 2

a)=-2a2-7c

b)=10x-14y-3y+7x=17x-17y=17(x-y)

c)=15x-10+6x2-4x=6x2+11x-10

d)=8x2-2x-(x2+2x-2x-4)=8x2-2x-x2+4=7x2-2x+4