Comment simplifier au max SVP

60-[2([tex] \frac{x(10-x)}{2} [/tex] + 2[tex] \frac{(x(6-x)}{2} [/tex]] =

60-[2(10x-x²)/2)+2(6x-x²)/2] =

60-(20x-2x²)/2 + (12x-2x²)/2] =

60-(10x-x²+6x-x²) =

60 - 10x+x²-6x+x² =

2x²-16x+60