Question

use algebraic method to find (309)²​

Answer 1

Answer:

(309)^2 = (300 + 9)^2

(309)^2 = (300 + 9)^2 = (90000 + 5400+ 81)

(309)^2 = (300 + 9)^2 = (90000 + 5400+ 81) (a+b)^2 = a^2 + 2ab + b^2

(309)^2 = (300 + 9)^2 = (90000 + 5400+ 81) (a+b)^2 = a^2 + 2ab + b^2 =95481.

Answer 2

Step-by-step explanation:

★ Question:-

Use algebraic method to find (309)²

★Solution:-

(309)² can be written as (300+9)²

From this, we can use the identity (a+b)² = a²+b²+2ab

(300+9)² = (300)² + (9)² + 2 × 300 × 9

= 90000 + 81 + 5400

= 90081 + 5400

95481

Hope it helps.