@mathstudent55
Please check;
I got B as my final answer

Question

@mathstudent55 
Please check;
I got B as my final answer

anonymous · Answer

attachment

mathstudent55 · Answer

No, not B.

anonymous · Answer

I've eliminated everything except for options "B" and "C".

dan815 · Answer

xD

anonymous · Answer

-I thought you only square to cancel the square root and since what you do to one side you do to the other, you have to square  the 81 as well. Why wouldn't it be "B" ; you square the 25?
@mathstudent55

mathstudent55 · Answer

Step 3 of the solution is correct since there is no error going from step 2 to step 3.

dan815 · Answer

square the left and right side, see what happens

mathstudent55 · Answer

Step 3 is not squaring the sides.
Step 3 is simply combining like terms on the left side. Step 3 is correct.
In Step 2 there is -4 + 25 which becomes 21 in Step 3. That is correct.

anonymous · Answer

Therefore, I'm right.. it is B..

anonymous · Answer

it's step 2

anonymous · Answer

oh wait they put the steps backward, step 2 is on option c... oops

mathstudent55 · Answer

You need to interpret the choices correctly.
Choice B is that there is an error in Step 3.
I already told you there is no error going from Step 2 to Step 3. The answer is not B.

mathstudent55 · Answer

What is your final answer?

anonymous · Answer

step 2 was my answer always.. just I picked the wrong letter
I looked at the options wrong, it's c.. my bad.

mathstudent55 · Answer

Ok, great. That is correct.
Can you tell me why Step 2 is incorrect?