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Find the roots of the equation using the Quadratic Formula
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$\frac{5^2- 7^x}{\cos\left(\frac{\pi}{8}\right)}=\frac{9}{5}$
Learn how to solve quadratic equations problems step by step online. Find the roots of (5^2-7^x)/cos(pi/8)=9/5. Find the roots of the equation using the Quadratic Formula. The cosine of \frac{\pi}{8} equals . Simplify the fraction \frac{5^2- 7^x}{0.9238795}. Calculate the power 5^2.