Q1a    5x² = 9 − x

5x² + x − 9 = 0

So, yes, it is a quadratic equation with

a = 5, b = 1, c = -9

Q1b    (3x − 2)² = 2

9x² − 12x + 4 = 2

9x² − 12x + 2 = 0

So, yes, it is a quadratic equation with

a = 9, b = -12, c = 2

 

Q2 2x² − 7x + 6 = 3

2x² − 7x + 3 = 0

(2x − 1)(x − 3) = 0

So