Heng Hong Hwee's answer to Piranha's Secondary 3 A Maths Singapore question.
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In this case, where there are no real roots, we cannot use the concept of symmetry in quadratic functions to find the max/min value. Instead, we have to complete the square and use the a(x-k)+h to find the max point (since its a sad face quadratic) and then find the maximum value ( y value of maximum point)
Date Posted:
4 years ago
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