Question

Need help regarding polynomial identities!

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Which polynomial identity will prove that (3 + 6)^2 = 81?

Difference of Squares
Difference of Cubes
Sum of Cubes
Square of a Binomial

@ganeshie8 @mehek14 @johnweldon1993 @Preetha

Answer 1

I believe its Square of a Binomial. But I need some reassurance.

Answer 2

I find Square of the Binomial to be the answer since 81, can obviously be squared to get 9.

Answer 3

However the 3 + 6 is making me believe its another answer.. and thats all I got :/

Answer 4

@hwyl

Answer 5

@ganeshie8 @johnweldon1993 @Directrix

Answer 6

@IshipDestiel

Answer 7

> (3 + 6)^2 = 81

Where is the variable?

Answer 8

hmm... 3 and 6.

Answer 9

3 would be representing the x and 6 would be representing the y? Atleast that is what I would presume.

Answer 10

And of course x+y^2 or in this case 3+6^2 would be equal to 81, the 3+6 would represent the sum, and since 9 is the sum, if you square it you get 81, thats why I think its square of the binomial

Answer 11

I am thinking that also.

Looking at the options against the problem, there are no cubes involved, and there is no difference of squares.

That leaves Square of a Binomial.

Answer 12

How about your thoughts john? :)

Answer 13

Exactly that^ There are quite literally no options except Square of a Binomial that make sense haha

Answer 14

hmmm, I just submitted my test and I got 2 wrong. I dont know why exactly since I checked them repeatedly and they were right each time. The question I just did was correct. Would you guys not mind checking these?

Answer 15

No problem

Answer 16

I did the processes that are needed myself 2 times and then used mathway to make sure. I personally find the grading system to be incorrect.

Answer 17

But if there were some simple mistakes there please let me kknow :)

Answer 18

Is this correct?