1.

8 ( 4 x %2B 5 y ) ^ 2 - 12 ( 4 x %2B 5 y )

Answer»

8(4x + 5y)^2 - 12(4x+ 5y).

= 8(16x^2 + 25 y^2 + 40xy ) - (48x + 60y)

= 128x^2 + 200y^2 + 320xy - 48x - 60y



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