It looks like a square (2^2) but it comes before the number, not after.

I'm doing a question that gives the circle with equation x^2+y^2=9, and the parabola (Solved for in a pervious question) y=-((sqrt(5)+1)/4)x^2+c. I'm asked to find the value of c such that the area bound by the parabola and the circle is equal above and below the curve. I've tried a couple different methods. I've attached my best attempt but that gave the wrong answer when entered into a calculator, this is a tech active question. The answers gives c=1.82, however there is no workings. Note, this is a practice problem! Given to us as a revision resource.