Question

$8(5x + 9y) {}^{2} + 12(5x + 9y)$
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Answer 1

8 ( 5x + 9y )² + 12 ( 5x + 9y )

= 8 ( 5x + 9y ) ( 5x + 9y ) + 12 ( 5x + 9y )

= 4 ( 5x + 9y ) [ 2 ( 5x + 9y ) + 3 ( 1 ) ]

= 4 ( 5x + 9y ) ( 10x + 18 y + 3 )