Question

Zapisz w jak najprostszej postaci: a.)2x(x-5)-3(x²-2x)+(x-2)x=
b.)a(a+b+c)-b(a-b+c)-c(a-b-c)=
c.)x(x²+2x+1)-(-4x³+8x²-6):2=



na teraz szybko!

Answer 1

a.)

2x(x-5)-3(x²-2x)+(x-2)x=2x²-10x-3x²+6x+x²-2x=-6x
b.)

a(a+b+c)-b(a-b+c)-c(a-b-c)= a²+ab+ac-ab-b²-bc-ac+bc+c²=a²-b²
c.)

x(x²+2x+1)-(-4x³+8x²-6):2=x³+2x²+x+2x³-4x²+3=3x³-2x²+x+3

Answer 2

a.)2x(x-5)-3(x²-2x)+(x-2)x=2x²-10x-3x²+6x+x²-2x=-6x

b.)a(a+b+c)-b(a-b+c)-c(a-b-c)=a²+ab+ac-ab+b²-bc-ac+bc+c²=a²+b²+c²

c.)x(x²+2x+1)-(-4x³+8x²-6):2=x³+2x²+x-(-2x³+4x²-3)=x³+2x²+x+2x³-4x²+3=3x³-2x²+x+3