book Maths Puzzle Numerical Ability

i need assistance on this question to do with conics::

x² +y² +2x -7 = 0

Read Solution (Total 0)

book Other Question

Thank you for making this resource available to me. I am struggling with a word problem.Here goes:
"Are those your children I hear playing in the garden?" asked the visitor.
what is (-5y3)(-4y8)