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I. 63x² + 148x + 77 = 0

II. 21y² + 89y + 88 = 0

What is the nature of the roots of the quadratic equation x² – 5x + 7 = 0 ? 

I. 56x² - 99x + 40 = 0

II. 8y² - 30y + 25 = 0

I. 2x² – 10x – 48 = 0

II. y² – 16y – 297 = 0

I. y/16 = 4/y 

II. x³ = (2 ÷ 50) × (2500 ÷ 50) × 4² × (192 ÷ 12)

I. 8a² – 22a+ 15 = 0

II. 12b² - 47b + 40=0

I. (x^13/5 ÷7) = 5488 ÷ x^7/5

I. 2x² - 9x + 10 = 0

II. 3y² + 11y + 6 = 0

I. x² + 11x + 24 = 0

II. y² + 17y + 72 = 0

Solve: x² − 7x + 12 = 0