exam Maths Puzzle Numerical Ability

9. Find the maximum or minimum value of the following quadratics, and the corresponding values of x:
a. y=3x^2+4x+7
b. y=-2x^2-5x+2

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exam Other Question
carol,ava and cindy swim at a public pool each day . one day carol swam twice as many laps as ava and cindy swam three more laps than ava. if the women swam 27 laps together, how many laps did each swim? pg. 261
94) Swimming space. The length of a rectangular swimming pool is 2x - 1 meters, and the width is x + 2 meters. Write a polnomial that represents the area. Find the area if x is 5 meters.
answer: 2x^2+3x-2sq. m. 63 sq. m.