x2 - (2x)2 = x2 - 4x2 = -3x2
x2 - 2x2 = -x2
x = ? 42 = x squared minus x
-22 - -22
By factoring I get x-3 divided by x+3
xsquared minus x minus 72
(x - 5)(x + 4)
(x−6)(x+5)
Sin squared, cos squared...you removed the x in the equation.
x + 1
The answer to x2 - 2x - 4y2 - 4y =(x - 2y)(x - 2y - 2)
(x+4)(x-7)
x squared plus 5
It is: (x+5)(x-8) when factored