3a^2+2ab-(a-2b)/3+(8a^2-12ab+a-b)/6,其中a=2,b=-3/2

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3a^2+2ab-(a-2b)/3+(8a^2-12ab+a-b)/6,其中a=2,b=-3/2
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3a^2+2ab-(a-2b)/3+(8a^2-12ab+a-b)/6,其中a=2,b=-3/2
3a^2+2ab-(a-2b)/3+(8a^2-12ab+a-b)/6,其中a=2,b=-3/2

3a^2+2ab-(a-2b)/3+(8a^2-12ab+a-b)/6,其中a=2,b=-3/2
3a²+2ab-(a-2b)/3+(8a²-12ab+a-b)/6
=[9a²+6ab-(a-2b)]/3+(8a²-12ab+a-b)/6
=[18a²+12ab-2(a-2b)]/6+(8a²-12ab+a-b)/6
=(18a²+12ab-2a+4b+8a²-12ab+a-b)/6
=(26a²-a+3b)/6=26×4-2-9/2
=65/4

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