1.

(3a2 – 8ab – 2b2 ) – (3a2 – 4ab + 6b2 ) = …………….. A) – 4ab + 8b2B) 4ab + 8b2C) 4ab – 8b2D) -4ab - 8b2

Answer»

Correct option is D) -4ab - 8b2

(3a2 - 8ab - 2b2) - (3a2 - 4ab + 6b2)

 = 3a2 - 3a2 - 8ab - (-4ab) - 2b2 - 6b2

= -8ab + 4ab - 8b2

= -4ab - 8b2



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