What two numbers multiplied together equal - 420, but added together equal 1

Question

Moore

Mathematics

25 August, 18:16

What two numbers multiplied together equal - 420, but added together equal 1

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Answers (2)

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Jesse Jordan · Answer 1

-21 x 20 multiplied together equal - 420 but added together equals 1

Eliza Frye · Answer 2

x * y = - 420

x + y = 1 ... x = 1 - y

y (1 - y) = - 420

-y^2 + y = - 420

y^2 - y - 420 = 0

(y + 20) (y - 21) = 0

y + 20 = 0 x + y = 1

y = - 20 x - 20 = 1

x = 21

y - 21 = 0 x + y = 1

y = 21 x + 21 = 1

x = - 20

ur 2 numbers are 21 and - 20