book Maths Puzzle Numerical Ability

Simplify the radicals....
radical sign 40 + radical sign 10 + radical sign 2/5

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Can anyone help me with this problem????
I need to see what the graph would look like for f(x)=x^2+2

Please post the graph so that I can see what it looks like....thanks given g(x)= -2x^2-8x+12.......what are the solutuions for g(x)=0, and g(x)<0.