Question

Choose the correct simplification of the expression (5a7b)2.

25a14b2
25a^9b^2
25a^14b
10a^14b^2

Answer 1

1 think its Option A but 1'm not sure

Answer 2

\[(5a7b)^{2}=(5a7b)(5a7b)\]
which would give \[25a ^{2}49b ^{2}\]

Answer 3

or if you are multiplying by 2 then you would just do 2x5 and 2x7
then you get 10a14b

Answer 4

oh sorry the 7 is an exponent

Answer 5

oh lol

Answer 6

my bad

Answer 7

\[(5a ^{7}b)^{2}\]

Answer 8

then you get
\[(5a^{7}b)^{2}=(5a^{7}b)(5a^{7}b)\]

Answer 9

which gives
\[(25a^{7+7}b^{1+1})\]

Answer 10

yeah you were right

Answer 11

awesome thanks

Answer 12

can you help me with another?

Answer 13

sure

Answer 14

Choose the correct simplification of the expression (6x^2y)^2(y^2)^3.

12x^4y^8
36x^4y^5
36x^4y^8
12x^2y^7

Answer 15

1'm pretty sure its the third one

Answer 16

well done :)

Answer 17

okay thanks