Question

factorise -16a^2+20a^3​

Answer 1

Answer:

$- 16 {a}^{2} + 20 {a}^{3} \\ \\ 4 {a}^{2}( - 4 + 5a) = 0 \\ \\ - 4 + 5a = 0 \\ \\ -4 = -5a\\ \\a=4/5$