Answer:
7/9
Explanation:
6x^3-8y^3-12x^2y^2+4xy x=2/3 y=1/2
=6(2/3)^3-8(1/2)^3-12(2/3)^2(1/2)^2+4(2/3)(1/2)
=6(8/27)-8(1/8)-12(4/9)(1/4)+4(1/3)
=(16/9)-1-(4/3)+(4/3)
=(1 7/9)-1
=7/9
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