exam Maths Puzzle Numerical Ability

What are the coordinates of the focal point y=3(2)(^2x+4)-5 ????? I have a real problem with these, so I hope someone can help me :)Note: the exponent is 2x+4.

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exam Other Question

Determine whether each of the following trinomials is perfect square. If it is, factor the trinomial.

Stumped

x squared-24x+48 I need to solve the problem using an augmented matrix. The problem is:
2x-3y+z=5
x+3y+8z=22
3x-y+2z=12

I put it in augmented matrix notation myself:
2 -3 1 5
1 3 8 22