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:

asked Oct 21, 2021 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:

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6 votes

Answer:

None of them are correct

Explanation:

Got answer wrong

Shubh answered Oct 23, 2021

by Shubh

4.8k points

5 votes

Answer:

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

Steve Simms answered Oct 26, 2021

4.0k points

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