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obliviousho2018
17.07.2019 •
Mathematics
Solve (sqr)(x-5) +7= 11 and identify whether it is extraneous
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Ответ:
======
Thank you for posting your question with clear formatting for the square root.
Subtract 7 from both sides
Square both sides of the equation.
This would be the step that can introduce extraneous solutions.
It will not always introduce them.
A solution to an equation only works if the solution results in a true statement when it put it in the original equation.
To check whether this proposed solution of x = 21 is extraneous, substitute it back into the original equation and see if we get a true statement.
This resulted in a true statement as 11 is equal to 11.
The solution to the equation is x = 21 and it is not extraneous because the solution works in the original equation.
Ответ:
3 1/6
Step-by-step explanation:
5 6/12 - 2 4/12=
(5-2) (6-4)/12=
3 2/12
3 1/6