Which of the following is a quadratic function ?
a. y=(x+2)(2x-3)
b. y=(3x-4)
c. y= 1/x^2
d. y=x(x-4)(x+3)

I think the ones which qualify as quadratic functions is
a
This is because any quadratic function must be able to take the standard form as ax²+bx+c
(x+2)(2x-3)=2x²-3x+4x-6=2x²+x-6

Ithink if im not mistaking b is -3 but im not a 100% sude

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