$\displaystyle (25^x)-(6(5^x))+5=0$

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- Nov 16th 2013, 10:51 AMGragadoodleExponential Equation
$\displaystyle (25^x)-(6(5^x))+5=0$

- Nov 16th 2013, 11:46 AMHallsofIvyRe: Exponential Equation
$\displaystyle 25= 5^2$ so $\displaystyle 25^x= (5^2)^x= 5^{2x}= (5^x)^2$. Replace $\displaystyle 5^x$ by y and solve the quadratic equation for y.