Question

9(2a-b)^2-4(2a-b)-13

Answer 1

Answer:

=

$9( {2a - b}^{2} ) - 4(2a - b) - 13 \\ 9( {4a}^{2} + {b}^{2} - 4ab) - 8a + 4b - 13 \\ {36a}^{2} + {b}^{2} - 36ab - 8a + 4b - 13$