exam Maths Puzzle Numerical Ability

The parabola y=x2-4 intersects the x axis at two points, P and Q. What is the distance from P to Q?

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exam Other Question

Bobby has $167 in his savings account. He withdraws $115, deposits $53, and then withdraws $95. Which shows the ending balance of his account?

Thank you 2-i / 3-4i ,2-i/3-4i*3+4i/3+4i, 6+8i_3i_4i^2/15 ,10+5i/15 ,5(2+i)/5(3), 2/3 + 1/3i