exam Maths Puzzle Numerical Ability

Hi. I'm having some trouble finding the vertex of this function. Can you help me?

y = 8x^2 + 5x

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exam Other Question

1. (3x^2-5x+2)(3x^2-5x-2)=21
2. (x/x+2)^2 -7(x/x+2)+12=0; x is not= -2
3. solve: a/ax-1 + b/bx-4 =a+b
4. 1/p+1/q+1/x = 1/x+p+q If a square has deimensions of a square has 3m x 7m waht would the base for the right solid be if it is 8m high, calcualte the surface area for the solid.