Answers edited by xurongna_

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• What are the y- and x-intercepts for #f(x) = 2x^3 - 6x^2 - 20x#?
  
• How do you solve #8x-10=x^2-7x+3# using the quadratic formula?
  
• How do you find the vertex for #y=x^2+6x+7#?
  
• A manufacturer of shipping boxes has a box shaped like a cube. The side length is (5a + 4b). What is the volume of the box in terms of a and b? Show your work.