exam Maths Puzzle Numerical Ability

(10+(square root 20))-(4-(square root 45))
I got 12+2(square root 20)-2(square root 45)
Am I even close?

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exam Other Question

find domain and range

f(x)=2-square root xsquared+3x+2divided by x squared+5x+4
Simplify



25^(3/2)