Expand:(√3x-√5y)^2

Question

it is a question from the chapter algebraic expressions 

Answer 1

Assuming the variables are not under the radical.

(√3√3)x² - (2√3√5)xy + (√5√5)y²          Same general form presented by Arturo O.

3x² - 2xy√15 + 5y²

Answer 2

(a + b)² = a² + 2ab + b²

(a - b)² = a² - 2ab + b²

 

[√(3x) - √(5y)]² = [√(3x)]² - 2√(3x) √(5y) + [√(5y)]² = 3x - 2√(15xy) + 5y