F4 maths thxxxxxxxx?

2015-08-22 12:17 pm
step plz
Find the optimum values of the following quadratic functions.
1.y=-4x^2+20x+5

2. y=-3x^2-3x-9/4

回答 (1)

2015-08-25 5:52 am
Quadratic formula
Given y=0


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