x³-2x²+x= x(x²-2x+1)= x(x-1)²

là TRUYỆN NGẮN nhé bạn

bài 1

a) y(x-z)+7(z-x)= y(x-z)-7(x-z)= (x-z)(y-7)

b) 27x².(y-1)-9x³.(1-y)= 27x².(y-1)+9x³.(y-1)= (y-1)(27x²-9x³)

bài 2

a) 5(x+3)+2x(x+3)=0

=(x+3)(5+2x)=0

\(\Leftrightarrow\)x+3=0 hoặc 5+2x=0

=>x=-3 hoặc x=\(\dfrac{-5}{2}\)

b)=4x(x-2014)-(x-2014)=0

= (x-2014)(4x-1)=0

\(\Leftrightarrow\)x-2014=0 hoặc 4x-1=0

=>x=2014 hoặc x= \(\dfrac{1}{4}\)

câu c) thấy kì kì, k biết làm

Choose the word or phrase among A, B, C or D that best fits the blank space in the following passage.

Question 6

A.known

B.afraid

C.capable

D.aware

Is the flim "Harry Potter" on at 8.30 ?