Question

Tìm x biết:
(x+1)(3-2x)=-2x(x-5)

Answer 1

\((x+1)(3-2x)=-2x(x-5)\) 

\(<=>(x+1)(3-2x)-2x(x-5)=0\) 

\(<=>3x-2x^2+3-2x-2x^2+10x=0\) 

\(<=>11x-4x^2+3=0\) 

\(<=>[11x=0<=>[x=0\) 

\(<=>[-4x^2=0<=>[x=2\) 

\(<=>[x+3=0<=>[x=-3\)

Answer 2

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

3x - 2x² + 3 - 2x + 2x(x - 5)

-2x² + x + 3 + 2x² - 10x = 0

-9x = -3

x = 1/3