Factor the expression 4b^2-9

Question

Abel Day

Mathematics

27 December, 11:45

Factor the expression 4b^2-9

+3

Answers (2)

Know the Answer?

Ernesto · Answer 1

(2b - 3) (2b + 3)

Step-by-step explanation:

4b² - 9 ← is a difference of squares and factors in general as

a² - b² = (a - b) (a + b)

4b² = (2b) ² ⇒ a = 2b and 9 = 3² ⇒ b = 3, so

4b² - 9 = (2b) ² - 3² = (2b - 3) (2b + 3)

Dominique Wells · Answer 2

answer is 7

Step-by-step explanation:

4b squared minus 9,16 is 4b squared because 4 time 4 is 16. thats how you would solve squared. then you want to minus 16 by 9, then your answer should be 7.