65.5k views
5 votes
Which of the equations are true identities?

A. (5b- 2)^2+ 4 = 25b^2– 20b
B. (2x² + y^2)(2x² - y2) = 4x^2– y
Choose 1 answer:

User Seungmin
by
8.1k points

2 Answers

6 votes

Answer:

None of them are correct

Explanation:

Got answer wrong

User Shubh
by
8.9k points
5 votes

Answer:

A

Explanation:

I assume that you mean -4 instead of +4 in the first one


(5b-2)^2-4=25b^2-20b+4-4=25b^2-20b

then A is the correct answer

User Steve Simms
by
8.2k points
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