2xdo 5 -7xdo 3= 2xdo 3-6xdo 2+3x-9

a)   [latex]2x^5-7x^3=x^3(2x^2-7)=x^3(sqrt2 x-sqrt7)(sqrt2 x+sqrt7)[/latex]   b)   [latex]2x^3-6x^2+3x-9=2x^2(x-3)+3(x-3)=(2x^2+3)(x-3)[/latex]

2x⁵-7x³ = x³(2x²-7) = x³(√2 x-√7)(√2 x+√7)   2x³-6x²+3x-9 = 2x²(x-3)+3(x-3) = (2x²+3)(x-3)