Question

if
10x2 - 6xy + y 2 - 4x + 4 =0
find the value of (x+2y) = ?​

Answer 1

Answer:

given that: 10x²-6xy+y²-4x+4=0

by separating 10x² into two part

• x²+9x²-6xy+y²-4x+4=0

by rearranging this

• x²-4x+4+9x²-6xy+y²=0

this equation become perfect square of two part

• (x-2)²+(3x-y)²=0

⇒x-2=0 or 3x-y=0

⇒x=2 and y=6

by putting this value into desired function

(x+2y)=2+2*6

x+2y=14  ans.