Question

if (2.57)²=6.605 then, find (25.7)² without squaring 25.7

Answer 1

Answer:

660.5

Step-by-step explanation:

We have, 2.57² = 6.605

We have to find 25.7²

25.7² = (2.57 × 10)² = 2.57² × 100

We already know what 2.57² is. So..

25.7² = 6.605 × 100

= 660.5