Question

5r2 - 8r =0

the 2 is quared.​

Answer 1

{0, 8/5}

Explanation:

Please present this 5r2 - 8r =0 as 5r^2 - 8r = 0 or as 5r² - 8r = 0.

Factoring out the r, we get r(5r - 8) = 0.

Setting each factor = 0 separately and finding r in each case, we get:

r = 0 and

5r = 8, so that r = 8/5.

The roots of this polynomial equation are {0, 8/5}.