Question

a²-b² where a =2 b=1 find pls ​

Answer 1

Answer:

3

Step-by-step explanation

(a + b) (a - b)

(2 + 1) (2 - 1)

(3)(1)

3

Answer 2

Answer:

3

Step-by-step explanation:

Given

a = 2

b = 1

a² - b² = (a + b)(a - b)   (Theorem)

(a + b)(a - b) = (2 + 1)(2 - 1) ⇒ (a + b)(a - b) = (3)(1)   ...(i)

a² - b² = (3)(1)   (Substituting (i))

⇒ 3

Hope this answer helps you.