Question

What is the value of (x+y), if (x-y) = 11 and xy= 20​

Answer 1

Step-by-step explanation:

x-y=11.....….(First equation)

xy=20.........(Second Equation)

From the first Equation, we get

x-y=11

y=x-11.......(1)

Substituting the value of (1) in Second Equation.

xy=20

x(x-11)=20

x²-11x=20

x²-11x-20=0

Hope it helps