Question

please say the answer fast. 11th sum 2nd and 3rd sub division

Answer 1

2.
$4{x}^{2} + 9 + 12x - (4 {x}^{2} + 9 - 12x)$
$4 {x}^{2} + 9 + 12x - 4 {x}^{2} - 9 + 12x$
=24 x

3.
$9 {x}^{2} + 16{y}^{2} - 24xy + 9 {x}^{2} + 16 {y}^{2} + 24xy$
= 18x^2 + 32y^2


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