Question

if 4 x square + y square is equals to a and x y is equals to b find the value of 2 x +y​

Answer 1

Step-by-step explanation:

4*x²+y²=a...,.(1)

xy=b.........(2)

from equ (1)

(2x)²+y²+4xy-4xy=a

by algebraic equations(a+b)²=a²+b²+2ab

we get

(2x+y)²-4xy=a

from equ 2

(2x+y)²-4b=a

(2x+y)²=a-4b

(2x+y)=√(a-4b)