Question

Friends please tell this. urgent it is ​

Answer 1

Answer:

4m² + 16m + 15

Step-by-step explanation:

Given : (2m + 3)(2m + 5)

→ 2m(2m + 5) + 3(2m + 5)

→ 4m² + 10m + 6m + 15

→ 4m² + 16m + 15

Or

Given : (2m + 3)(2m + 5)

Identity : (x + a)(x + b) = x² + (a + b)x + ab

Here, x = 2m, a = 3, b = 5

→ (2m)² + (3 + 5)(2m) + (3)(5)

→ (2m)² + (8)(2m) + (3)(5)

→ 4m² + 16m + 15

Similar Identities are :

• (a + b)(a - b) = a² - b²

• (a + b)(a + b) = a² + 2ab + b²

• (a - b)(a - b) = a² - 2ab + b²