Sagot :
g(x)= (2x+1)²-(5/2x-1)(2x+1)
=(2x+1)(2x+1)-(5/2x-1)(2x+1)
=(2x+1)(2x+1-5/2x+1)
=(2x+1)([tex] \frac{4-5}{2} x[/tex]+2)
=(2x+1)([tex] \frac{-x}{2} [/tex]+2)
=(2x+1)(2x+1)-(5/2x-1)(2x+1)
=(2x+1)(2x+1-5/2x+1)
=(2x+1)([tex] \frac{4-5}{2} x[/tex]+2)
=(2x+1)([tex] \frac{-x}{2} [/tex]+2)