Question

[Hi im OmniTrix]

5 + 3x - ( 2 + x ) < 5x + 1

( x - 2 ) ( x + 1 ) - x ( x + 4 ) <= x

Answer 1

[Đức Hiếu]

a,\(5+3x-\left(2+x\right)< 5x+1\)

\(\Rightarrow5+3x-2-x-5x-1< 0\)

\(\Rightarrow-3x< -5+2+1\Rightarrow x< \dfrac{2}{3}\)

b, \(\left(x-2\right)\left(x+1\right)-x\left(x+4\right)\le x\)

\(\Rightarrow x^2+x-2x-2-\left(x^2+4x\right)-x\le0\)

\(\Rightarrow x^2-x-2-x^2-4x-x\le0\)

\(\Rightarrow-6x\le2\Rightarrow x\le-\dfrac{1}{3}\)

Chúc bạn học tốt!!!

Answer 2

[Hi im OmniTrix]

cảm ơn ạ ^^