Question

What multiplies to make -10 and adds to make 11?

Answer 1

`xy=-10`

`x+y=11`
Rearrange and substitute

`y=11-x`

`x(11-x)=-10`

`-x^(2) +11x+10=0`

`(-x+10)(x-1)`

`x=1or,x=-10`
substitute 1 and -10 in for x to find y