Hello All, wishing all memebers a great start to the New-Year!
I'm not sure if my working is entirely ok below... Tried using latex..no idea why it didnt work..?
Factorise: [tex] 50x^2-10xy-20y^2 [\math]
10(5x^2-xy+2y^2)
10[(5x^2 - 2y^2) - xy]
10[( \sqrt5x + \sqrt2y)^2 -xy )]
10[( \sqrt5x + \sqrt2y) ( \sqrt5x + \sqrt2y) - 7.32xy ] * completing the square
We have:
Solving on
we obtain
So,
Fernando Revilla
You can use FernandoRevilla's post which is the most elementary.
Here, use the quadratic formula to get:
You only need to substitute those now in the previous expression.
Oh and the LaTeX works with the forward slash '/' and not backslash '\' in the math tabs.