Question 330576
5x[(2x^2 - 7x + 9) - (2x^3 + 4x^2)/(2x^2)] 
= 5x[(2x^2 - 7x + 9) - (2x + 2)]
= 5x[2x^2 - 7x + 9 - 2x - 2]
= 5x(2x^2 - 9x + 7)
= {{{10x^3 - 45x^2 + 35x}}}