已知抛物线y=ax²+bx+c,若4a-2b+c+4=0,则抛物线必经过的点是A(2,4)b(-2,4)C(-2,-4)D(2,-4)
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![已知抛物线y=ax²+bx+c,若4a-2b+c+4=0,则抛物线必经过的点是A(2,4)b(-2,4)C(-2,-4)D(2,-4)](/uploads/image/z/3911634-18-4.jpg?t=%E5%B7%B2%E7%9F%A5%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dax%26%23178%3B%2Bbx%2Bc%2C%E8%8B%A54a-2b%2Bc%2B4%3D0%2C%E5%88%99%E6%8A%9B%E7%89%A9%E7%BA%BF%E5%BF%85%E7%BB%8F%E8%BF%87%E7%9A%84%E7%82%B9%E6%98%AFA%282%2C4%29b%28-2%2C4%29C%28-2%2C-4%29D%282%2C-4%29)
已知抛物线y=ax²+bx+c,若4a-2b+c+4=0,则抛物线必经过的点是A(2,4)b(-2,4)C(-2,-4)D(2,-4)
已知抛物线y=ax²+bx+c,若4a-2b+c+4=0,则抛物线必经过的点是A(2,4)b(-2,4)C(-2,-4)D(2,-4)
已知抛物线y=ax²+bx+c,若4a-2b+c+4=0,则抛物线必经过的点是A(2,4)b(-2,4)C(-2,-4)D(2,-4)
选C
已知抛物线y=ax²+bx+c,所以有
x=-2时
y=4a-2b+c
若4a-2b+c+4=0,则有
x=-2时
y=-4
抛物线必经过的点是C(-2,-4)