Question

Solve (x - 3)2 = 5.

O A. x = 8 and x = -2
B.
X = -35
C. X-5+13
Ô D. x = 3 + 6

Answer 1

Ok, here we have this, for f(x)=A*g(Bx-C)+D, where g(x) is one of the trigonometric basic functions, C/B is called a phase shift, so if we work, we get this:

2cos(3x+2pi)+1

f(x)=2cos(3x+2pi)+1

g(Bx-C)=cos(3x+2pi), B=3, C=-2pi, D=1

Then, the phase shift is: C/B= -2PI/3

So, the correct answer is D.