exam Maths Puzzle Numerical Ability

G(F(x)) g(x)=x/x+2 F(x)=2/x

2/x
______ solve.... and find the domain.
2/x +2

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exam Other Question

If A=3x2-2x-7 and B=x2+9, then what is their sum, A+B?

5x2-2x+2
4x2-2x-2
4x2+2
4x2-2x+2
none of these I keep coming up with a solution that is different from the answer key. Here is the problem: Find the area of an isosceles triangle where the base is 3 and the sides are the square root of 11.
Thanks