What is the value of the following expression: 6x^2 + 9y^2?
1. x = 2
2. 6y^2 + 4x^2 = 22
i think the ans is C.
PLEASE advice
1. x = 2
2. 6y^2 + 4x^2 = 22
i think the ans is C.
PLEASE advice
answer should be (B)
Clearly 1 is not sufficient
(2)
6y^2 + 4x^2 = 22
=> 2(3y^2 + 2x^2) = 22
=> 3y^2 + 2x^2 = 11
The question can be reduce to 3(2x^2 +3y^2)
Using the info we found from (2), the value will be 3x 11 = 33.
Hence, (B)
