What is the axis of symmetry of the function f(x)=−(x+9)(x−21)?
x=−15
x=−6
x...
Mathematics, 04.05.2020 22:53, xyzendre
What is the axis of symmetry of the function f(x)=−(x+9)(x−21)?
x=−15
x=−6
x=6
x=15
Answers: 3
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