One solution.
(cos x)2 - 2cos x = 3
Factor:
(cos x - 3)(cos x + 1)= 0
cos x = {-1, 3}
Solve:
For cos x = -1, x = 180 deg
No solution for cos x = 3
5
Anything minus itself is zero.
(x + 3)(x - 1)(x + 1)
(-9) / 3 = -3 . Minus nine divided by three is equal to minus three
Three times negative 2 minus three is equal to -9
By factoring I get x-3 divided by x+3
It is: 9-4 = 5
5
Three plus three minus 7 is equal to -1
Anything minus itself is zero.
two hundred minus three times a number is equal to nine
(x + 3)(x - 1)(x + 1)
3 squared is 3 x 3 or 9.
(-9) / 3 = -3 . Minus nine divided by three is equal to minus three
No, three squared is nine. 3(squared sign) =3x3 =9
Three times negative 2 minus three is equal to -9
Three minus three times six plus two is equal to -13.