Formula of (a-b)^2 and (a+b)^2

Step-by-step explanation:

(a-b)^2 = a^2 - 2ab +b^2

(a+b)^2 = a^2 + 2ab + b^2

0.6

39mph

step-by-step explanation:

the answer would be d

straight away you can eliminate a and c because not all books contain a scientific skill because some may be fiction. c is also wrong because it saids that the only way children can learn is through books which is incorrect.

b is also wrong because reading can be a scientific skill but not always, therefore it is wrong which leaves you with d, the correct answer since it said that it can children learn.

hope this ! : 3