Question

Simplify using formula

Answer 1

Answer:

(3a-b-c)(3a+b+c)

Step-by-step explanation:

9a² - (b + c)²

➪ (3a)² - (b + c)²

now, by using

a² - b² = (a + b) (a - b)

(3a-b-c)(3a+b+c)

Answer 2

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9a² - (b + c)²

➪ (3a)² - (b + c)²

now, by using

• a² - b² = (a + b) (a - b)

➪ (3a + b + c) (3a - b - c)