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OpenStudy (hippoharry):
Which of the following represents the line of symmetry of the parabola represented by the equation x^2 - 10x + 21 = 0? A. x = 5 B. x = 3 C. x = 2 D. x = 4
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OpenStudy (hippoharry):
@Erak
OpenStudy (erak):
Use the equation -b/2a
OpenStudy (erak):
Where in standard form it is a^2 + bx + c = 0
OpenStudy (hippoharry):
the answer is 5? becuase 10/2 is 5
OpenStudy (erak):
yes
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