Simplify: 3√50 − 2√8 + √18

I. y² - 7 y – 18 = 0

II. x² + 10 x + 16 = 0

I. 2x² - 11x + 12 = 0

II. 12y² + 29y + 15 = 0

I. 40x² + 81x + 35 = 0

II. 63y² + 103y + 42 = 0

I. 3p² - 11p + 10 = 0

II. 2q² + 13q + 21 = 0

I. 2x² – 19x + 45 = 0

II. y² – 14y + 48 = 0

If the roots of the quadratic equation 6m² + 7m + 8 = 0 are α and β, then what is the value of [(1/α) + (1/β)]?

 If x satisfies x² – 14x + 40 = 0, find x.

I. 81x - 117√x + 40 = 0

II. 81y - 225√y + 136 = 0

If the roots of the quadratic equation 5x² + 4x + 6 = 0 are α and β, then what is the value of [(1/α) + (1/β)]?

I. 4x² - 21 x + 20 = 0

II. 8y² - 22 y + 15 = 0