Question

The value of K in the given expression (3x+y)² = 9x² + k xy +y²​

Answer 1

Given ,

(3x+y)² = 9x² + k xy +y²

→ (3x)² + 2×3x×y + y² = 9x² + k xy + y²

→ 9x² + 6xy + y² = 9x² + k xy + y²

→ 6xy = k xy

→ k = 6xy/xy

→ k = 6

Answer 2

Step-by-step explanation:

Given,

=>(3x+y)^2 = 9x^2 + k xy + y^2.

=>9x^2 + 6 xy + y^2 = 9x^2+ k xy + y^2.

=>6 xy = k xy.

=>6 xy/xy = k.

=>k = 6.