Asked by My Mom's gonna kill me
Hi so I'm like in 7th grade and they asked me
'Factor. 144b² - 121c²'
idk what life is anymore tbh
'Factor. 144b² - 121c²'
idk what life is anymore tbh
Answers
Answered by
oobleck
They want you to notice that all of the items in the expression are perfect squares.
Then recall that x^2-y^2 = (x-y)(x+y)
So, if x=12b and y=11c, you have
(12b)^2 - (11c)^2 = (12b-11c)(12b+11c)
When you see something like this that looks hard, just remember that you haven't learned very many rules yet, so anything they ask you to solve will use one of those few basic rules.
Then recall that x^2-y^2 = (x-y)(x+y)
So, if x=12b and y=11c, you have
(12b)^2 - (11c)^2 = (12b-11c)(12b+11c)
When you see something like this that looks hard, just remember that you haven't learned very many rules yet, so anything they ask you to solve will use one of those few basic rules.
Answered by
henry2,
144b^2-121c^2.
Take the sq. root of each term:
(12b-11c)
Multiply by the sum:
(12b-11c)(12b+11c).
Take the sq. root of each term:
(12b-11c)
Multiply by the sum:
(12b-11c)(12b+11c).
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