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Find the roots of the equation using the Quadratic Formula
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$\frac{21x^2+15x}{-3x}=0$
Learn how to solve equations problems step by step online. Find the roots of (21x^2+15x)/(-3x). Find the roots of the equation using the Quadratic Formula. Factor the polynomial 21x^2+15x by it's greatest common factor (GCF): 3x. Simplify the fraction . Take \frac{3}{-3} out of the fraction.