book Maths Puzzle Numerical Ability

Any help with this problem would be greatly appreciated

Rationalize the denominator:
2____
√[6] - √[5]

Thanks

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book Other Question

Simplify as simple fraction with all exponents positive:
(x^-3*y^-2*z^-3)-(y^-1*z^-3)/(3*x)-(x^2*y) I am trying to help a friend with her homework, but we have both hit a brick wall, can someone send us the process to solve the following equation?
2/5(10x+25)=-10-4(x+3)
Thank you so much for your help.
Patty & Sunshine