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Using the formula

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If a quadratic has roots, they can always be found using the quadratic formula. Starting with the general form or the problem:

ax2 + bx + c = 0

Simply substitute the numbers (a,b and c) into the formula

b_n = \frac{2}{p}\int^{xb}_{xa} f(x) \sin(nkx) \, dx, \,\quad n \ge 1
b_n = \frac{2}{p}\int^{xb}_{xa} f(x) \sin(nkx) \, dx, \,\quad n \ge 1
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