Question
If 8x2 + y2 − 12x − 4xy + 9 =
0, then the value of (14x − 5y) is :Solution
8x²+y²-12x-4xy+9 = 0 8x²+y²-12x-4xy+9 = 0 (2x-y) ² + (2x-3) ² = 0 ∴ 2x-3 = 0 ⇒ x = 3/2 2x-y = 0 3-y = 0⇒ y= 3 ∴ (14x-5y) = 14× 3/2 − 5 × 3 = 21-15 = 6
More Equations Questions
- What will come in place of (?) in the given number series.
3, 9, 15, 21, ?, 33 Find the missing number in the given number series.
2, 7, 19, 62, ?, 1270
Find the missing number in the given number series.
4, ?, 110, 665, 4660, 37285
- What will come in place of (?) in the given number series.
1, 8, 27, ?, 125, 216 - What will come in place of the question mark (?) in the following series?
6, 6, 9, ?, 32, 56 What will come in place of the question mark (?) in the following series?
111, 109, 115, ?, 211, -509
16, 24, 36, ?, 81, 121.5
18, 30, 46, 66, 90, ?
41, 82, ?, 984, 4920, 29520
22, 37, 63, 98, 148, ?
Relevant for Exams:
