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 =

`= (-3+/- √(-111) )/(2)= \\ x _(1) = (-3+i √(111) )/(2) \\ x_(2) = (-3-i √(111) )/(2)`
Answer: Those two numbers are:

`x= (-3- i√(111) )/(2) \\ y = (-3+i √(111) )/(2)`