Question

помогите пж очень надо

Answer 1

81а^6-90а^3b^2c+25b^4c^2=(9a^3-5b^2c)^2

Answer 2

$81 {a}^{6} - 90 {a}^{3} {b}^{2} c + 25 {b}^{4} {c}^{2} = {(9 {a}^{3} - 5 {b}^{2} c )}^{2}$