X=1/2
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(2x + 1)(2x + 1) or (2x + 1)2 so x = -0.5
B squared -4ac is the discriminant. you get 0, which means it will have one rational solution.
Using the discriminant for a quadratic equation the value of k works out as plus or minus 12.
many solutions
x + 4x = 05x = 0x = 0/5x = 0