exam Maths Puzzle Numerical Ability

I need help simplifing 2*square root 12 + 4*square root 27

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exam Other Question

6x^2+5x-6>0 Which of the following polynomials is NOT a perfect square trinomial?

x2 + 2x + 1
4x2 - 4x + 1
x2 + 3x + 9
16x2 + 8x + 1
all of them are perfect square trinomials