Question

given the sun and product of two numbers. Find two number .
b) sum= -9 product = 18​

Answer 1

Answer:

Let the numbers be x and -9-x

Product of numbers = 18

x(-9-x) = 18

-9x-x² = 18

x²+9x+18 = 0

x²+6x+3x+18 = 0

x(x+6)+3(x+6) = 0

x+3 = 0 or x+6 = 0

x = -3 or x = -6

This there are 2 ways as x can be -3 or -6

When x = -3

-9-x = -9-(-3) = -9+3 = -6

When x = -6

-9-x = -9-(-6) = -9+6 = -3

Therefore the two numbers are -3 and -6.