Which is a quadratic function? A.c(x)=6x+3x^3. B.d(x)=x-8x^4. C.p(x)=-5x-x^2. D.k(x)=2x^2+9x^4

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asked Sep 3, 2019 90.2k views

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Matt Hall · Answer 1 · 2019-09-08T07:28:38+0000

A function is a quadratic only if the highest power of x is 2. This automatically eliminates A and D. Of the 2 remaining possible answers, which one can you eliminate?

Which is a quadratic function? A.c(x)=6x+3x^3. B.d(x)=x-8x^4. C.p(x)=-5x-x^2. D.k(x)=2x^2+9x^4

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