What are the solutions of 2x^2 + 7x = 4
½
4
-½
-4
7
-7

I got -1/2 and -4 as the solutions.

explication;for a polynomial of the form ax 2 + b X + c, rewrite the middle term as a sum of two terms whose product is a c = 2 ⋅ - 4= -8 and whose sum is b = solution;