Solve the following equation using quadratic formula:
9x2 + 7x - 2 = 0
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Find the value of k for which x = 3 is a solution of the quadratic equation (k + 2)x2 - kx + 6 = 0.
Thus, find the other root of the equation.
x2 - 4x + 1 = 0
4 - 11x = 3x2