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OpenStudy (anonymous):
-3x^2+9x+7 for x = -3
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OpenStudy (anonymous):
so -3 to the 2nd power plus 9x3plus 7
OpenStudy (anonymous):
36
Directrix (directrix):
-3x^2+9x+7 for x = -3 -------------------- -3* (-3)^2 + 9*(-3) + 7 = -3 * 9 - 27 + 7 which does NOT sum to 36 as stated above. @fareastmovement13
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