I think you mean to solve:
(-2 cos23x) - (3 sin 3x) = 0
cos2 x + sin2 x = 1
⇒ cos2x = 1 - sin2 x
⇒ -2 cos2 3x - 3 sin 3x = -2(1 - sin2 3x) - 3 sin 3x = 0
⇒ 2 sin2 3x - 3 sin 3x - 2 = 0
⇒ (2 sin 3x + 1)(sin 3x - 2) = 0
⇒ sin 3x = -1/2 or 2
sin 3x = 2 is impossible as the range of sine is -1 ≤ sine ≤ 1
Thus:
sin 3x = -1/2
⇒ 3x = 2nπ - π/6 or 2nπ - 5π/6
⇒ x = 2/3nπ -π/18 or 2/3nπ -5π/18
12
3x3 -3x2 - 48x - 60 = 0 simply factor out a 3... 3(x3 - x2 - 16x - 20) = 0
One-houndred and thirty five.
A Letter.14-2x=3x+113-2x=3x3=5xX=0.6
Unfortunately, limitations of the browser used by Answers.com means that we cannot see most symbols. It is therefore impossible to give a proper answer to your question. Please resubmit your question spelling out the symbols as "plus", "minus", "equals", "squared", "cubed" etc. Please use "brackets" (or parentheses) because it is impossible to work out whether x plus y squared is x + y2 of (x + y)2. There is no operator between 3x3 and x2 (which I assume are 3x-cubed and x-squared).
1x9:9 3x3:9
3 feet equals 1 yard. So 3x3=9.9 ft
12
- 3X3 + X2 + 17 + 6X4Three. I will put the coefficients in parentheses.(- 3 )X3 + (1)X2 + 17 + (6)X4=========================( remember, 1 is always an implied coefficient )
it is 3x3 not that hard
3x3 -3x2 - 48x - 60 = 0 simply factor out a 3... 3(x3 - x2 - 16x - 20) = 0
3 to the power of 2 is the same as saying 3x3, which equals 9. (The answer is 9.)
One-houndred and thirty five.
y
2 cubed is 2x2 and 3 squared is 3x3x3x3, you can multiply 2x2 which equals 4 and 3x3x3x3 equals 81, (because 3x3 is 9 and 3x3 shows up 2 times you multiply 9,2 times) so then you have to multiply 81x4 81 x 4 ____ 324
3x3
No.However, the dimensions 3 feet by 3 feet = 9 square feet, and that equals a square yard.