The answer is suppose to be (3x-8y)^2
(3x)^2 - 2(24xy) + (8y)^2 ≠ (3x+8y)^2 = (3x-8y)^2Owen and shawn kit btwfyi.
in this situation, it should be (a-b)^2.as a is 3x and b is 8y, it should be (3x-8y)^2 instead of (3x+8y)^2
Whats wrong: operation errorHow it should look like: = (3x-8y)^2Sandy and Ruoyu
This is a type 2 question and it should be in a (a-b)^2 format and not in a (a+b)^2 format . The sign in the final answer should be '-' Final answer : (3x-8y)^2
This is a type 2 question, therefore the answer should be in (a-b)^2 format. So the answer should be (3x - 8y)^2, not (3x + 8y)^2.
Yi Chieh,Kai En, JiajunThe answer should be (3x-8y)^2 because it follows the pattern of (a-b)^2.
(abhi and toby)
This student's working is correct, however his/her answer is wrong. The answer should be "(3x - 8y)^2" and not "(3x + 8y)^2" as the formula is (a-b)^2 = a^2 = 2ab + b^2The answer should be ->9x^2 - 48xy + 64y^2= (3x)^2 - 2(24xy) + (8y)^2= (3x - 8y)^2