If 9x2 +25y2 = 181 and xy = -6, find the value of 3x +5y

Here, we will use (a+b)2 = a2 + b2 + 2ab

Q9 of 84 Page 5

If 9x² +25y² = 181 and xy = -6, find the value of 3x +5y

Here, we will use (a+b)² = a² + b² + 2ab

If x² + = 66, find the value of x -

If x² + = 79, find the value of x +

If 2x +3y = 8 and xy = 2, find the value of 4x² +9y²

If 3x - 7y = 10 and xy = -1, find the value of 9x² + 49y²