
We know that : (a - b)(a + b) = a² - b²

We know that : 1 - sin²x = cos²x



We know that : sec²x = 1 + tan²x







Answer:

Step-by-step explanation:
we have

step 1
Eliminate the parenthesis

The symbol of the term 3x is incorrect, must be positive instead of negative
so

Group terms that contain the same variable

Combine like terms

6 faces, 12 edges, and 8 vertices
60x1.15=69
Retail price is $69
Answer:
17y+4z-5
Step-by-step explanation: