Question
$$(-3x+5)(-3x+5) = 0$$
Answer
$$ x = \dfrac{ 5 }{ 3 } $$
Explanation
$$ \begin{aligned} (-3x+5)(-3x+5) &= 0&& \text{simplify left side} \\[1 em]9x^2-15x-15x+25 &= 0&& \\[1 em]9x^2-30x+25 &= 0&& \\[1 em] \end{aligned} $$
$ 9x^{2}-30x+25 = 0 $ is a quadratic equation.
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