exam Maths Puzzle Numerical Ability

Please help me with the problem below. Thank you!

sqrt7(2sqrt3+3sqrt7)

Thank you very much!

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exam Other Question

Factor the following polynomials:

4y^2+16y+16

I came up with this:(2y^2)+2y*8+4^2=(y+4)(y+4)

Also this polynomial:

x^2-25/x+5

It reads x squared -25 over x+5

This 3y squard=192