Calculus area between the curves?

Given 2 functions H(x)=x^(2) and P(x) = 4-x^(2 )- q*x.
Note, the function P also has a parameter, q which is a real number.

Find the real value(s) of the parameter q such that the area of the region enclosed between these two functions is equal to 25.
Update: I know that I have to equal the two equations to know where they intersect, but how I get the values when I don't know the value of q?
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