Louise completed the work shown below.

(5x3 + 3)2 = (5x3)2 + (3)2 = 25x6 + 9
Determine if Louise’s answer is correct. Explain.

Question

Louise completed the work shown below.

(5x3 + 3)2 = (5x3)2 + (3)2 = 25x6 + 9
Determine if Louise’s answer is correct. Explain.

Shadow · Answer

@ericagaines12

Shadow · Answer

$$(5x^3 + 3)^2 = (5x^3)^2 + (3)^2 = 25x^6 + 9$$
Is this what it looks like?

ericagaines12 · Answer

yes

Mercury · Answer

note: in general,

(A+B)^2 is not equal to A^2 + B^2

with that being said do you think Louse is right or not?

ericagaines12 · Answer

no

Mercury · Answer

well done, so you would just say Louse is not correct and then explain why

Mercury · Answer

to be a bit more specific, (A+B)^2 under order of operations, the exponent must be evaluated first

so (A+B)^2 = (A+B)(A+B) = A^2 + 2AB + B^2 not just A^2 + B^2

ericagaines12 · Answer

thank youuuuu !

ericagaines12 · Answer

what about this one ?? 
Charlie used a regression calculator to generate the equation f(x) = –0.15x + 20.1 for the ordered pairs (2, 15), (4, 21), (6, 26), (8, 20), and (10, 14).

Is a linear representation the best way to represent the data? If it is, explain why. If not, explain why and suggest a better alternative.

ericagaines12 · Answer

@shadow