Question

1.Oblicz

W(x)-V(x)

W(x)=(x+2)^2-3x+x^3-4x^2

V()=(x-3)(x+3)+2x^3-x

2.Rozloz na czynniki

a) V(x)=16x^2-1/25

b) V(y)=y^2+2/3y+1/25

c) W(x)=2x^3+x^2-2x-1

d) W()=x^2(x+2)+x+2

3.Rozwiąz

a) (9x-3)(2x-5)(4-x)^3=0

b) x^2(x^2-1)-9(x^2-1)=0

c) x^3-3x^2-4x+12=0

Answer 1

1
(x+2)^2-3x+x^3-4x^2-(x-3)(x+3)+2x^3-x=x^2+4-3x+x^3-4x^2-x^2+3x-3x-9+2x^3-x=
=3x^3-4x^2-4x-5
2
a) (4x)^2-(1/5)^2zastosuj wzór skróconego mnożenia: a^2-b^[email protected]+b^2

b) y(y+2/3) + 1/25

c) x(2x+x-2) - 1

d) x^3+2x^2+x+2= x(x^2+2x+1) + 2