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In ordinary mathematics, assuming that x = X and that X2 denotes x2 or x-squared, there cannot be a counterexample since the statement is TRUE.
However, there are two assumptions made that could be false and so could give rise to counterexamples.
1. x is not the same as X. If, for example X = 4x then X = -20 so that X2 = 400.
2a. X2 is not X2 but X times 2. In that case X2 = -10.
2b. X2 is x2 modulo 7, for example. Then X2 = 4.
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What number must you add to complete the square x2 plus 10x equals 8?
Twenty-Five x2 + 10x = 8 x2 + 10x + 25 = 8 + 25 (x + 5)2 = 33
Solve x2 equals 64?
x2 = 6482 = 64x = 8
X2 plus 7 equals 36?
if x2 + 7 = 37, then x2 = 29 and x = ±√29
What is the value of the function x2 plus 3 at x equals 5?
f(x) = x2 + 3 ----> f(5) = (5)2 + 3 ----> f(5) = 28
6x -1 equals 29 what is the value of x² plus x?
6x - 1 = 29 => 6x = 30 => x = 5 Then x2 + x = 25 + 5 = 30
When x equals 5 and y equals 2 find the value of x2 plus 2y?
x2 + 2y = 52 + 2*2 = 25 + 4 = 29
How do you answer the problem x2 plus 10x plus equals 0?
x2 + 10x = 0 x2 + 10x + 25 = 25 (x + 5)2 = 25 x + 5 = +-5 x1 = 0 x2 =10
How do you complete the square x2 - 6x equals 16?
x2 - 6x = 16 ∴ x2 - 6x + 9 = 25 ∴ (x - 3)2 = 25 ∴ x - 3 = 25 ∴ x = 28
What is x squared plus16 equals 25?
If: x2+16 = 25 Then: x = 3
What times 2 equals 50?
25
Find the radius for a circle with the equation x2 plus y2 equals 25?
x^2 + y^2 = r^2
If y equals -2 when x equals 4 find x when y equals 5?
x1:y1 = x2:y2 4:-2 = x2:5 x2 = (4*5)/-2 x2 = -10
What is x2 plus 4x plus 4 equals 25?
x2+4x+4 = 25 x2+4x+4-25 = 0 x2+4x-21 = 0 (x+7)(x-3) = 0 x = -7 or x = 3
What the radius for a circle with the equation x2 plus y2 equals 25?
5. A circle with centre (0,0) has equation: x2 + y2 = radius2 With: x2 + y2 = 25 = 52 The radius is 5.
X2-10x plus 25 equals 0?
x2 - 10x + 25 = 0(x - 5)(x - 5) = 0x - 5 = 0x = 5
X2 plus 5x -25 equals?
We can't calculate what it equals until we know the value of ' x '.
Radius for a circle with the equation x2 plus y2 equals 25?
9
