If 3u + 2v = 7 and uv = 2, then the value of (3u -2v) is :
Answer & explanation
Correct answer: option 3
We know that,
If x + y = n
then, x - y = \(\sqrt {n^2 - 4xy}\)
If 3u + 2v = 7
uv = 2,
then the value of (3u -2v) = \(\sqrt {7^2 - 4(2)(6)}\) = 1
If 3u + 2v = 7 and uv = 2, then the value of (3u -2v) is :
Correct answer: option 3
We know that,
If x + y = n
then, x - y = \(\sqrt {n^2 - 4xy}\)
If 3u + 2v = 7
uv = 2,
then the value of (3u -2v) = \(\sqrt {7^2 - 4(2)(6)}\) = 1