Can someone help me on this?

Step-by-step explanation:

We know that cosx = sin( - x)

We can apply it here:

sin(55°) = cosx

cos( - 55°) = cosx

Now we apply the arccos to both sides:

x = - 55° + 2k or x = - - 55° + 2k

step-by-step explanation:

the correct answer option is (2x-3)(2x+3).

step-by-step explanation:

we are given the following expression and we are to factorize it:

we are to find such factors that when multiplied they give a result of 36 (9 x 4 = 36) and when added they give a result of 0.

the two such factors of 36 are negative six and postive six.

factorizing the given expression to get:

therefore, the correct factorization of is (2x-3)(2x+3).