4x(2x^2 − 7x + 3)
Let's take it term by term
4x* 2x^2 = 4*2*x*x^2 = 8x^3
4x *(-7x) = 4*(-7)*x*x = -28x^2
4x*3 = 4*3*x = 12x
Put it all together...
8x^3 - 28X^2 + 12x
And that's it ... !!!