d: \(\Leftrightarrow\left(x-5\right)\left(x+5\right)-3\left(x-5\right)=0\)
=>(x-5)(x+2)=0
=>x=5 hoặc x=-2
e: \(\Leftrightarrow\left(3x+1+2x-5\right)\left(3x+1-2x+5\right)=0\)
=>(5x-4)(x+6)=0
=>x=4/5 hoặc x=-6
f: \(\Leftrightarrow2x^2-4x-3x+6=0\)
=>(x-2)(2x-3)=0
=>x=2 hoặc x=3/2



