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Unfortunately, limitations of the browser used by Answers.com means that we cannot see most symbols. It is therefore impossible to give a proper answer to your question. Please resubmit your question spelling out the symbols as "plus", "minus", "times", "equals", "squared".
It would appear that x2 is meant to be x-squared.
Since you have been able to use the - sign (for 20x), I am assuming the missing symbol before 280 is not "-".
But if it is "+", then the expression does not have real factors. If you are OK with complex factors, then you should be advanced enough not to ask this question.
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How do you factor x2-20x plus 100?
(x - 10)(x - 10)
What is the factor of 4xsquared-20x plus 16?
4x2 - 20x + 16 = 4(x2 - 5x + 4) = 4(x - 1)(x - 4)
X2 plus 20x plus 4 equals 0?
x2 + 20x + 4 = 0 x2 + 20x + 100 = 96 (x + 10)2 = 96 x + 10 = ±961/2 x = -10 ±961/2 x = -10 ±4√6
What is x2 plus 20x plus 10c?
A trinomial.
What is the solution to this equation -20x equals -300?
280
