p2 = 2p + 15
p2 - 2p - 15 = 0
(p - 5)*(p + 3) = 0
so p - 5 = 0 or p + 3 = 0
so p = 5 or p = -3
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15 -7 = 8
(x-3)(x-5) = 0
It equals 285
15 squared is 15 x 15 which equals 225.
x2+x-15 = 0 Using the quadratic equation formula: x = 3.405124838 or x = -4.405124838