Asked by ki

SOLVE THE FOLLOWING EQAUTION BY COMPLETING THE SQUARE:

3. xsquared - 8x - 10 = 0

xsqaured -8x=10
xsquared-8x+(8/2)sqaured=10+(8/2)sqaured
xsquared-8x+16=26

Answer: xsqaured-8x+16=26

WHAT DID I DO WRONG?


Answered by Reiny
I will do it without "words"

x^2 - 8x = 10
x^2 - 8x + 16 = 10+16
(x-4)^2 = 26
x-4 = ± √26
x = 4 ± √26

you stopped and didn't finish it
Where was your "completed square" ?
Answered by ki
i don't know what that means
Answered by ki
is that the answer
Answered by Reiny
Are you taking this topic in a regular class-room setting?
If you are studying the topic of "completing the square", which was part of the instructions to your problem, you MUST know what this means.
Answered by Reiny
yes, that is the answer.

you could say
x = 10+√26 OR x = 10 - √26

or you could convert to decimals with your calculator.
Leaving it in square root form is considered exact, while as soon as you change square roots to decimals you are dealing with approximations.
Answered by Reiny
that should have said:

you could say
x = 4+√26 OR x = 4 - √26
There are no AI answers yet. The ability to request AI answers is coming soon!