Question

What multiplies to 280 but also adds or subtracts to -34

Answer 1

the numbers are "a" and "b"
so we know a*b = 280 and a+b = -34

well $\bf \begin{cases} ab=280\implies \boxed{b}=\cfrac{280}{a}\\\\ a+b=-34\\ ----------\\ a+\boxed{\frac{280}{a}}=-34 \end{cases}$

solve for "a"

what's b?   well, b = 280/a