Let x \mathbin{\spadesuit} y = \frac{x^2}{y} for all x and y such that y\neq 0. Find all values of $a$ such that $a \mathbin{\spadesuit} (a + 1) = 9$. Write your answer as a list separated by commas.
Let's call this "spadesuit" a function called g, so, A g B=a^2/y
which would conclude that a can be 9−3√132, and 9+3√132.
+972 
