exam Maths Puzzle Numerical Ability

Okay, the instructions say to Solve the Radical Equation...
6-√2x=-2
I know how to solve Radical Equations, but we were not told how to do ones that had a negative sign before the √. I really appreciate your help.

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exam Other Question

(((-2a^3b^5)^3)times(8a^5bc^2)^0))) Write each equation in the form y = a(x-h)2 + k:

y = 2x2 + 20x + 50