令3x=-3
x=-1
所以f(-3)=9*(-1)²+6*(-1)+7=10
猜你喜欢
- 1一个梯形的面积是360平方米,高为18米,则它的上下底之和是（）米.
- 2he has been away from home for months这句话中has been away做什么成分?什么是谓语动词?
- 3把一个正方体削成一个最大的圆柱,圆柱侧面积为12.56平方厘米,正方体侧面积是多少?体积是多少?
- 4在铜锌原电池中,（电解质溶液为硫酸铜溶液,阳极为锌片,阴极为铜片）,
- 5You should have your eyes ___ by a doctor
- 6北师大版小学数学四年级寒假作业第八页第二题答案
- 7英译中 A study of the people in China's largest cities shows that saving money for children's ...
- 8量筒,托盘天平的精确度分别是多少?
- 9People+who+think+they+have+no+time+for+exercise+will+soon+find+time+for+illness.
- 10已知点A(3,0),曲线X^2 Y^2=2上一点B,点B满足向量AP=2向量PB,求点P的轨迹方程.