Answer:
Step-by-step explanation: 26+2c=312
Now we solve for c.
Subtract 26 on both sides giving 2c=286
So c=143
Answer:3(4x^2-9y^2)
Step-by-step explanation:
Answer:
this cannot be simplified is the best answer
Step-by-step explanation:
The answer i got is -(tan(x)+1)(tan(x)-1) / tan^2(x)