exam Maths Puzzle Numerical Ability

I need help solving these two problems on Radicals:
1. Radical 18 + Radical 12 + Radical 8 =
2. 3 radical 7 - 2 radical 28 =

Read Solution (Total 0)

exam Other Question

Assume all variable are positive and multiply
y^3/5 (y^-3/5 + 5y^2/5) 1) F(x)=-x^5+3x^3-x round to three decimal places
I need to estimate the relative maxima and minima of the polynomial function
I got minima -1.57 and maxima 1.57 but i'm not sur