1)) <<A Multiply. Write your answer in simplest form. (4k^2)/(5k-4)cdot (5k+20) square

To multiply the given expression, we need to multiply the numerators and denominators separately.<br /><br />Step 1: Multiply the numerators:<br />$4k^{2} \cdot (5k+20)$<br /><br />Step 2: Multiply the denominators:<br />$(5k-4) \cdot 1$<br /><br />Step 3: Simplify the expression:<br />$\frac{4k^{2} \cdot (5k+20)}{(5k-4) \cdot 1}$<br /><br />Step 4: Cancel out common factors:<br />$\frac{4k^{2} \cdot (5k+20)}{5k-4}$<br /><br />Therefore, the answer in simplest form is:<br />$\frac{4k^{2} \cdot (5k+20)}{5k-4}$