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Is x = -3 a solution of the equation 2x2 - 7x + 9 = 0 ?
The roots of the quadratic equation x2 - 6x - 7 = 0 are :
-1 and 7
1 and 7
-1 or 7
1 and -7
The roots of the quadratic equation x(x + 8) + 12 = 0 are :
6 or 2
-6 or -2
6 and -2
-6 and -2