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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.
What else can I help you with?
What is x if -3x equals 21?
x=-7
What is 3x-3 equals 7x 21?
If: 3x-3 = 7x+21 Then: x = -6
The quadratic formula x2 plus 8x - 5 equals 0?
x2 + 8x - 5 = 0 ∴ x2 + 8x + 16 = 21 ∴ (x + 4)2 = 21 ∴ x + 4 = ± √21 ∴ x = -4 ± √21
What type of lines are these x plus 2y equals 7 and 2x plus 4y equals 21?
They are parallel lines.
What does x equal when x plus 20x equals to 60000?
x+20x = 60000 21x = 60000 x = 60000/21 = 2857.'142857' recurring
X equals ab where a equals 21 and b equals 37 what is the answer to x?
x = ab x = 21*37 x = 777
What is the answer -x equals 21?
The answer is that the value of x is -21
What Is 9 plus x equals 21 for x equals 11?
x ≠11 9 + x = 21 9 + x - 9 = 21 - 9 x = 12
What equals to 21?
1 x 21, 3 x 7.
What times equals 21?
21 = 1 x 21, 3 x 7, 7 x 3, 21 x 1.
What is the LCM of 6and 21?
The answer is 42. 6 x 7 equals 42. 21 x 2 equals 42.
What is x if -3x equals 21?
x=-7
What is x plus 21 equals 36?
x + 21 = 36Subtract 21 from each side:x = 15
What is the answer to 21 over x equals 105 over 5?
21/x = 105/5 = 21 21 = 21x x = 1
What is the answer to7x equals 21?
If 7x = 21, then x=3 !
The variables x and y vary directly when x equals -5 and y equals 21 what is the constant of variation?
y = kx k = y/x = 21/-5 = - 21/5
9 plus x equals 21 for x equals 11?
This is not correct. If x=11, then 9+x=20. In order for 9+x=21 to be correct, x would have to be equal to 12.
