先化简,再求值：9x+6x²-3（x-x二分子三x²）,其中x=-2.

1)原式=3x(3+2x)=3×(-2)×[3+2×(-2)]
=6
2)原式=-3[x - (3/2)x^2]
=-3x[1-(3/2)x]
=-3×(-2)×[1-(3/2)×(-2)]
=24