x2
The square root of x has two answers. It's either x (which is +x), or it's -x. If we take x times x, the answer is x2. If we take -x times -x, the answer is also x2.
It is: x*x = x2
x2*x2...You would add the two exponents like this x(2+2), making it x4.
11-x2=-5 add -11 to both sides: 11-x2-11=-5-11 -x2=-16 divide both sides by -2: (-x2)/(-2)=(-16)/(-2) x=8 If the "x2" was supposed to be "x2", meaning exponentiation, ("x squared") and not "x2", implying multiplication, ("x times two") then we'd get: x2=16 x=±4
x2
The factors of x2 are x and x x times x plus 1 = x2 + x
(-x) (x) = -x2
Break the question down by using Order of Operations. What is x times x? It's X2. What is X2+15? It's X2+15.
x2
-x times -x = x2 (negative multiplied with negative = positive) sqrt of x2 = x
X squared equals x times x.
The square root of x has two answers. It's either x (which is +x), or it's -x. If we take x times x, the answer is x2. If we take -x times -x, the answer is also x2.
It is: x*x = x2
The answer is -x2.A fuller explanation is as follows:Where letter X is an unknown value, -1 times Xsquared ( -1 x X2 )is just a general statement about X and would be more properly written as -X2.If we substitute say 2 as the value of X then -X2 = -2 x -2,now both (2 x 2) and (-2 x -2) = 4thus both -1 x X2 or -X2 = 4From the above you can see that what "minus 1 times x squared" is equal to depends upon the value of the letter x or X as I have written it to avoid confusion with the "times" sign usually written as x.
X2 or 2 times x?
cos(x^2)=cos(x times x)