2,

1.I enjoy telling a jokes

2.he is tall so he can touch the light

3.my brother is generous so he willing lends someone money

4.What he is he look like

5.the questions is easy so we can answer it

what time do you and your sister have breakfast?

1 000 = 10³

1 000 000 = 10⁶

1 000 000 000 = 10⁹

100 ...0 = 10¹²

12 chữ số 0

ủng hộ mk nha

có 5 chữ c

TH1 : \(x< -4\), ta có:

\(-\left(x+1\right)+\left[-\left(x+4\right)\right]=3x\)

\(-2x-5=3x\)

\(5=-2x-3x\)

\(-5x=5\)

\(\Rightarrow x=-1\) ( Không thỏa mãn \(x< -4\) )

TH2 : \(-4\le x< -1\), ta có:

\(-\left(x+1\right)+\left(x+4\right)=3x\)

\(-x-1+x+4=3x\)

\(3=3x\Rightarrow x=1\)( không thỏa mãn \(-4\le x< -1\))

TH3 : \(x\ge-1\), ta có:

\(x+1+x+4=3x\)

\(2x+5=3x\)

\(\Rightarrow x=5\)(thỏa mãn)

Vậy x=5.

đáp án 30

b, (n+3)²- (n -1)²=(n+3- n+1)(n+3+ n- 1)

=4(2n+2)

=8n+ 8\(⋮8\)

nang gap doi ban nha