Question

If `|(2x, 5),(8, x)| = |(6, 5),(8, 3)|`, then find x

Answer 1

We have `|(2x, 5),(8, x)| = |(6, 5),(8, 3)|`.

This gives 2x² – 40 = 18 – 40

⇒ x² = 9

⇒ x = ±3.