Question

I have a question below

Answer 1

here w= 7 and h= 10

Answer 2

I can get the answer but i am confused how I can subsute the numbers, do i put the 7 and the 10 in brackets or normally?

Answer 3

because when we put the numbers in brackets the answer sometimes is differnt (negavitve ex (-7)^2 and -7^2

Answer 4

I ALWAYS put them in brackets. Even when it's not necessary, brackets are very helpful in letting you know what to do in these types of equations

Answer 5

2w^2+4hw ,where w=7 ,h=10
2(7)^2+4(7)(10)