SOLUTION: What is a quadratic function in standard form having zeros of 9 and -5? Thank you

For example, and as the simplest example, this function  q(x) = (x-9)*(x-(-5)),


which is equal to 


    q(x) = (x-9)*(x+5) =  = .



In more general situation, if you are asked to write the most general form of a quadratic function having the roots  and , 

then such a function is 


    q(x) = ,


where "a" is the leading coefficient, which can be any non-zero real number. 

If you open parentheses and make all necessary multiplications and combine like terms, you will get


    q(x) = .