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Unfortunately, the browser used for posting questions is hopelessly inadequate for mathematics: it strips away most symbols. As a result there is no equation in the question and so there can be no answer. It makes little sense for me to try and guess - I may as well make up my own questions and answer them!
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How many real solutions does the equation 3x2 12x 12 0 have?
If you mean: 3x^2+12x+12 = 0 then it has two equal solutions of -2
How many solutions are there to the equation 12x plus 6 5x?
None because without an equality sign the given expression is not an equation.
What quadratic equation has solutions of 5 and 7?
x2 - 12x + 35
How many solutions does the equation 14x plus 2 equals 12x have?
That looks like a linear equation (no quadratic or higher terms), so you can expect it to have a single solution. However, actually solving the equation is not difficult; do it, to confirm this.
What is the equation for the axis of symmetry of the quadratic function f(x) 3x2 12x - 2?
It is x = +/- 2 depending on whether the second term in the equation is -12x or +12x.
