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3 years ago

If x+y = -1, and xy= -12, what is the value of (x+3) (y+3) ?

Mathematics

1 answer:

9966 [12]3 years ago

7 0

Answer:

Here are my hints. You can solve it yourself

1/ xy = -12 --> x = -12/y

2/ (-12/y) + y = -1 --> -(12/y) + (y²/y) = -1 --> -12 + y² = -y --> y²+y-12=0

3/ From y²+y-12=0 we can find y then use y to find x and then do your

(x+3) * (y+3)

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