Open study

is now brainly

With Brainly you can:

  • Get homework help from millions of students and moderators
  • Learn how to solve problems with step-by-step explanations
  • Share your knowledge and earn points by helping other students
  • Learn anywhere, anytime with the Brainly app!

A community for students.

Multiply: (3a + 11)(3a - 11). 9a2 - 22 9a2 - 121 9a2 + 121 9a2 - 66a + 121 i know its either b or c but i donmt knwo which it is..

I got my questions answered at in under 10 minutes. Go to now for free help!
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

Join Brainly to access

this expert answer


To see the expert answer you'll need to create a free account at Brainly

Do you know the crab claw/Foil method to expand out the brackets?
This is the form: (a-b)(a+b) = a²-b². It pays to learn this form by heart, so you can recognise them immediately when you see one!
this is a difference of squares as ZeHanz stated

Not the answer you are looking for?

Search for more explanations.

Ask your own question

Other answers:

yes it is indeed but she can easily get the answer if she expands the brackets and collect like terms as well.
ii got the answer usinmg foil which is 9a^2+ (-121)
FOILing is fine! It's just that in SOME cases, you don't need it, because you can see the answer right away. This is such a special case. Another one: (3p+4q)(3p-4q). See: sum and difference of the same two numbers, so the answer is (3p)²-(4q)²=9p²-16q². You can save so much (spare) time with this...
but my answermy answer possiblities are 9a2 - 22 9a2 - 121 9a2 + 121 9a2 - 66a + 121
The answer you got from FOILING is correct, 9a^2+ (-121). but one thing, you forgot that + - becomes - 9a^2 -121
Also note for special cases as these u should learn them, so u are able to identify them straight away just as @ZeHanz shows it.
thank you peoples!
never use double signs|dw:1359206802362:dw|

Not the answer you are looking for?

Search for more explanations.

Ask your own question