We have:

Then we use trigonometric identities to change the negative sign of the trigonometric functions, so:

We clear f(x):

we simply what we can:

Thus, the correct answer is;
<span>x^2 - 12x - 45
= (x - 15) (x + 3) .........</span><span>factored form</span>
Answer:
A 3SIDED shape
Step-by-step explanation:
A:B = 2:3
A=126
B=?
126/2=63
63x3=189
A=126
B=189
A:B = 126:189