# Math Help - solve equation for two un-knows

1. ## solve equation for two un-knows

find the value of a and b,

$\frac{4}{5 +\sqrt{2}} = a +b\sqrt{2}$

I dont know how to do this, any help appreciated.

2. ## Re: solve equation for two un-knows

Since the fraction has a radical in the denominator, you want to simplify by multiplying both the numerator and the denominator by $5-\sqrt{2}$