Question

Please help, calculators wont work for the problem.
(a ­ - 2b)^2

Answer 1

`={ (a + 2b)}^(2) \\ = {a}^(2) + (2 * 2b * a) + {( - 2b)}^(2) \\ = {a}^(2) + 4ab + ({ - 2}^(2) * {b}^(2) ) \\ {a}^(2) + 4ab + 4 {b}^(2)`

Answer 2

a-2b
× a-2b

`{a}^(2) - 4ab + {4b}^(2)`