What two number multiplied equal 12 but also added together equal - 7

Question

Mathematics

Cecelia Ross

11 November, 04:41

What two number multiplied equal 12 but also added together equal - 7

+4

Answers (1)

Know the Answer?

Lea Suarez · Answer 1

A) x * y = 12

B) x + y = - 7

A) x = 12 / y

Substitute this into B

B) 12/y + y = - 7

multiplying both sides by "y"

12 + y^2 = - 7y

y^2 + 7y + 12 = 0

y = - 4

and from equation B we calculate x as - 3