x=-1.6
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It is: x2-10x+21 = 0 and the value of x is 3 or 7 when solved
x = -3.27 or -6.73
0
The discriminant is 900.
To solve this, you would normally set up a systems of equations 10x + 2y = 10 10x + 2y = 11 However, it clearly makes no sense and has no answer. To prove this mathematically, subtact the two equations. 10x - 10x = 0 2y - 2y = 0 10-11 = -1 Therefore, it is basically saying that 0 + 0 = -1 Obviously, that is incorrect, so this question has no solutions.