Question

if x+y =80 and xy = 1500 then find the value of x and y solve and also write the formula please give only answer​

Answer 1

Step-by-step explanation:

X + Y = 80 ----- 1

XY = 1500

Y = 1500/ X

Put the value in equ 1st

X + 1500/X = 80

X² + 1500 = 80X

X² - 80X + 1500 = 0

By factorisation

X² - 50X - 30X + 1500 = 0

X ( X - 50 ) - 30 ( X - 500) = 0

( X - 50 ) ( X - 30 ) = 0

X - 50 = 0 OR X - 30 = 0

X = 50 OR X = 30