Question

What’s the equivalent expression in expanded form (2x-5)^2

Answer 1

Answer:

4x^2 -20x +25

Step-by-step explanation:

Using the formula, write in standard form.

2*2 is 4

2*5 is 10

2*5 is 10

10 + 10 is 20

5*5 is 25

Answer 2

Question:

What is the expanded equivalent of cos(a – b)?

Answer:

D. cos a cos b + sin a sin b

Explanation:

I got it correct in my test :)