Chapter 4 Quadratic Functions and Factoring - 4.3 Solve x(squared) + bx + c = 0 - 4.3 Exercises - Skill Practice - Page 256: 47

3, -10

Since the coefficient of the squared term is one, we know that the expression must factor to: $$ (x\pm a)(x\pm b)$$ Here, we see that a and b must multiply to get $-30$ and add to get $7$. Thus, we find that the solution is: $$(x+10)(x-3)$$ Thus, setting each factor equal to zero, we find that the solutions are: $$x=-10,3$$