Question

x- (-2a²b)=90 a^9 b^15​

Answer 1

$x - ( - 2 {a}^{2} b) = 90 {a}^{9} {b}^{15} \\ x = - 2 {a}^{2} b + 90 {a}^{9} {b}^{15} \\ x = 2 {a}^{2} b(45{a}^{7} {b}^{14} - 1)$