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It is: 100x^2 -9 = (10x-3)(10x+3) when factored
6x2 + 10x = 2x*(3x + 5)
Are you seeking the factors? 7x2 - 10x + 3 = (x - 1)(7x - 3).
-3.
Assuming x(2-10x)=21 to be solved for x, distribute to -10x2+2x=21, or 10x2-2x+21=0. By the quadratic equation, we can determine there are no real solutions because the square root of -836 does not exist. In imaginary solutions, we can reduce to 1/10*(1 + sqrt(-209)) and 1/10*(1-sqrt(-209)) as solutions.