Question

Give two numbers which when multiplied has a product of 10 and a sum of - 7

Answer 1

Answer:

-5 and -2 are two numbers

Answer 2

X x Y = 10

X + Y = 7 => X = 7 - Y

subbing that into the first equation

(7-Y)Y = 10 => 7Y - Y^2 = 10 =>

Y^2 --7Y + 10 = 0

factoring

(Y-5)(Y-2) = 0 => Y = 5,2

then X = 2, 5