What is the factorization of 121b4 − 49?

121b⁴ − 49 = (11b² + 7) • (11b² - 7)

Step-by-step explanation:

The difference of two squares.

Step 1: reformat equation

11²b² - 49

Step 2: Factoring: 121b⁴- 49

Theory : A difference of two perfect squares, A2 - B2 can be factored into (A+B) • (A-B)

Proof : (A+B) • (A-B) =

A² - AB + BA - B² =

A² - AB + AB - B² =

A² - B²

Factorization is : (11b² + 7) • (11b² - 7)

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490

the reason why your question keeps getting deleted because this is not a school related question : )

i will answer your question though.

i never tried church's