x²-18x-100
=(x²-18x+81)-181
=(x-9)²-181
≥-181
-3x²-18x
=-3(x²-6x+9)+27
=-3(x-3)²+27
≤27
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求x^2-18x-100的范围,-3x^2-18x?
0
0
x²-18x-100
=(x²-18x+81)-181
=(x-9)²-181
≥-181
-3x²-18x
=-3(x²-6x+9)+27
=-3(x-3)²+27
≤27
很高兴为您解答,【学习宝典】团队为您答题.
请点击下面的【选为满意回答】按钮.