Question

What 2 numbers multiply to equal 30 but add to be -3?

Answer 1

10 and 3 why because 3 goes in to 30 10 times and 3 goes into 30 10 times

Answer 2

X * y = 30
x + y = - 3
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y = - 3 - x
x * ( - 3 - x ) = 30
- 3 x - x² = 30
x² + 3 x + 30 = 0
x 1/2 = ( - 3 +/- √(9 - 120 ) ) / 2 =
$= \frac{-3+/- \sqrt{-111} }{2}= \\ x _{1} = \frac{-3+i \sqrt{111} }{2} \\ x_{2} = \frac{-3-i \sqrt{111} }{2}$
Answer: Those two numbers are:
$x= \frac{-3- i\sqrt{111} }{2} \\ y = \frac{-3+i \sqrt{111} }{2}$