Question

If `[(x, 1)] [(1, 0),(-2, 0)] = 0`, then x equals

Options

• 0

• –2

• –1

• 2

Answer 1

2

Explanation:

`[(x, 1)] [(1, 0),(-2, 0)] = [(0, 0)]`

⇒ `[(x - 2, 0)] = [(0, 0)]`

⇒ x – 2 = 0   ...[By def. of equality]

⇒ x = 2