\(\left(5-x\right)\left(2x-\dfrac{1}{3}\right)=10x-2x^2-\dfrac{5}{3}+\dfrac{1}{3}x\\ =\left(10x+\dfrac{1}{3}x\right)-2x^2-\dfrac{5}{3}\\ =-2x^2+\dfrac{31}{3}x-\dfrac{5}{3}\)
\(\left(5-x\right)\left(2x-\dfrac{1}{3}\right)\)
\(=10x-\dfrac{5}{3}-2x^2+\dfrac{1}{3}x\)
\(=\dfrac{31}{3}x-2x^2-\dfrac{5}{3}\)
`(5-x)(2x-1/3) = 10x - 2x^2 - 5/3 + 1/3x`
`= -2x^2 + 31/3x - 5/3`
`(5-x).(2x-1/3)`
`=10x-5/3-2x^2+1/3x`
`=-2x^2+31/3x-5/3`
