We have the following expression: (2x + 5) * (7-4x) Rewriting we have: 14x - 8x ^ 2 + 35 - 20x Grouping terms with the same exponent: -8x ^ 2 + x (14-20) + 35 Rewriting: -8x ^ 2 - 6x + 35 Answer: the quadratic expression for this is: -8x ^ 2 - 6x + 35