When kara and Lauren add their ages, the sum is 20 when they multiply their ages, the product is 99 what is difference in their ages?

Question

Cristal

Mathematics

28 September, 03:09

When kara and Lauren add their ages, the sum is 20 when they multiply their ages, the product is 99 what is difference in their ages?

+3

Answers (1)

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Park · Answer 1

X+y=20

xy=99

Let a+b be denoted a, b

20 = 1,19 2,18 3,17 4,16 5,15, 6,14 7,13 8,12 (9,11) ... Stop

99=3^2*11

Thus the ages are 11 and 9 with a difference of 2.