Question: cannot use quadratic formula, trial and error and short cut methods 7. Determine the coordinate of the vertex for f(x) = 5(x+3)(x -7). (3) 8.

cannot use quadratic formula, trial and error and short cut methods

7. Determine the coordinate of the vertex for f(x) = 5(x+3)(x -7). (3) 8. Write the factored form of the relation that passes through the points (7,0), (15,0), and (9,36). (3) 9. Determine the minimum value of the function r(x) =7x -28x -84. (4)

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