What two number adds to 10 but multiply to 16

Question

Mathematics

Hale

10 December, 10:49

What two number adds to 10 but multiply to 16

+4

Answers (2)

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Gustavo Jarvis · Answer 1

Let 2 nos. be x & y

x + y = 10

x * y = 16

from 1st eqn, y = 10 - x

substituting in 2nd eqn

x * (10 - x) = 16

10x - x^2 = 16

x^2 - 10x + 16 = 0

(x - 8) (x - 2) = 0

x = 8 or x = 2

y = 10 - 8 = 2 or 10 - 2 = 8

so the two numbers are 2 and 8

Amani Villanueva · Answer 2

8 and 2 because 2+8=10 and 2 times 8 = 16