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ahahkhyati.j
- Junior | Next Rank: 30 Posts
- Posts: 13
- Joined: Sat Oct 03, 2015 1:46 pm
Hi,
Can someone please help me understand the following questions and how are they different?
1. If g(x) = 3x + x^1/2, what is the value of g(d2 + 6d + 9)?
In the above question they have taken both (d+3) and -(d+3) for x^1/2 to solve the equation
2. if x is negative and y is positive, what is (4x^2−4xy+y^2)^1/2
In this question it is mentioned that the number under root will only take positive value.
Can someone explain me what is the difference. From the rule i know if you have (x^2)^1/2 you can take both negative and positive values for x then shouldn't both these questions have both negative and positive value? Can someone please explain
thank you.
Can someone please help me understand the following questions and how are they different?
1. If g(x) = 3x + x^1/2, what is the value of g(d2 + 6d + 9)?
In the above question they have taken both (d+3) and -(d+3) for x^1/2 to solve the equation
2. if x is negative and y is positive, what is (4x^2−4xy+y^2)^1/2
In this question it is mentioned that the number under root will only take positive value.
Can someone explain me what is the difference. From the rule i know if you have (x^2)^1/2 you can take both negative and positive values for x then shouldn't both these questions have both negative and positive value? Can someone please explain
thank you.
