Factors (x - 7)(x + 2) so x = 7 or -2.
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6z - 3 = 0
many solutions
It has two equal solutions of 2
It has two solutions and they are: x = 3.230396696 and x = -2.063730029
There are no real solutions. The discriminant (b squared -4ac) is less than 0, so there are 2 imaginary solutions and 0 real ones.