Number of solutions og quadratic equations. f(x)=x^2-3x+18 . what is the value of the discriminant of f?
How many real number zeros does f have?

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What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

In dire need~! describe how to use area models to find the quotient 2/3 divided by 1/5. check your work by also finding the quotient 2/3 divided by 1/5 using numerical operations only.