book Maths Puzzle Numerical Ability

Please help me with this! Determine the quadratic equation for the parabola:
Minimum value is 4 when x=3
zeros of f: one is 6

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book Other Question

please help me solve this inequality: (x+2)(x-1)(x-3)<= 0 find the actual width of the doorway into the kitchen and the dining room if the scale is 2:24 and on the drawing the doorway is 1/4 of an inch.