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vladimir2022 [97]
3 years ago
6

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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