- I need help -5x^2+7x+4?

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Is this bv? Or? What kind of engineering degree is best for future?
Electric ?
Telecommunications?
Aerospace? Y = (-x^3)/(x^2- 9) What are the y and x intercepts. Step by Step would be nice :)? What is the formula for acceleration? I need to know how to work this.n=4; -1,4 and 3+3i are zeros. f(1)=-156?