(x + y + 2)(y + 1)
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Answer:
Step-by-step explanation:
1. You have the following function given in the problem:
2. Then, to find asked in the exercise, you only need to substitute
(which is the input value) into the given function.
3. Therefore, keeping the above on mind, you obtain that is:
Given
We have to set the restraint
because a square root is non-negative, and thus it can't equal a negative number. With this in mind, we can square both sides:
The solutions to this equation are 7 and -2. Recalling that we can only accept solutions greater than or equal to -1, 7 is a feasible solution, while -2 is extraneous.
Similarly, we have
So, we have to impose
Squaring both sides, we have
The solutions to this equation are 5 and 10. Since we only accept solutions greater than or equal to 7, 10 is a feasible solution, while 5 is extraneous.