Verified answer

Bonsoir,

1)  f(x)=2x²-5x=x(2x-5)

2)  g(x)=(2-x)(1-3x)+4x(1-3x)=(1-3x)(2-x+4x)=(1-3x)(2+3x)

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

                                                   =(2x+1)((4x)/2-(5x)/2+2)

                                                   =(2x+1)(-x/2+2)

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