Given that the opening direction and size of a parabola are the same as the parabola y = 3x & # 178;, and the vertex is the same as the parabola y = x & # 178; + 2, the analytic formula of the parabola is obtained

y=3x^2+2

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1. The parabola y = ax & # 178; + C passes through two points a (2,1), B (- 1, - 5), finds the expression of the parabola, and points out the opening direction and vertex coordinates of the parabola
2. Matching method, how to match the X & # 178; + 3x + 5 = y matching method into vertex form
3. Given that X and Y belong to R, and 3x ^ 2 + 2Y ^ 2 = 6x, find the maximum and minimum of X + y (require detailed answer)
4. If the value of 2Y's Square plus 3Y plus 7 is 8, what is the value of 4Y's Square plus 6y minus 9
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7. 14x & # 178; - 26x + 12 = cross multiplication factorization factor
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