(3/4a2+3b2)and4(a2-2/3b2
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=(3/4a2+3b2)4(a2-2/3b2)
=(3/8a+6b) 2×2a-2/3b
=3+48ab/8a×2×2a-2/3b
=3+48ab/8a×2×2a-1/3b
=3+48ab/4a×2(a-1)/3b
=3(1+16ab)/2a×a-1/3b
=(1+16ab×(a-1)/2ab
=a-1+16a×a×b-16ab/2ab
Hope it helps u..
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