\[
k) x^{2}-3 x=0
\]
i) $5 x^{2}+80 x=0$
ta) $3 x^{2}-6 x=0$

Answer

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Answer

$\boxed{\text{k) } x = 0, 3; \text{ i) } x = -16, 0; \text{ ta) } x = 0, 2}$

Steps

Step 1 ：Factor each equation and solve for x.

Step 2 ：For equation k) $x^2 - 3x = 0$, the solutions are $x = 0$ and $x = 3$.

Step 3 ：For equation i) $5x^2 + 80x = 0$, the solutions are $x = -16$ and $x = 0$.

Step 4 ：For equation ta) $3x^2 - 6x = 0$, the solutions are $x = 0$ and $x = 2$.

Step 5 ：$\boxed{\text{k) } x = 0, 3; \text{ i) } x = -16, 0; \text{ ta) } x = 0, 2}$