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Alja [10]
3 years ago
11

One integer is 5 less than another and their product is 84. Find the integers.

Mathematics
1 answer:
andrezito [222]3 years ago
5 0

The first integer is going to be x and the second one is going to be y.

We now turn the clues into equations:

x = y - 5

xy = 84

The substitution method:

(y - 5)y = 84

y^2 - 5y - 84 = 0

(y+7)(y-12) = 0

y = -7, 12.

If y = -7, then x = -12.

If y = 12, then x = 7

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