Question

R^2-9s^2
Factories
a^2-b^2=(r+9s)(r-9s)
=r^2-(3s)^2
=(r+3s)(r-3s)

Answer 1

Answer:

R²- 9s²= (R+3s)(R-3s)

Step-by-step explanation:

R²- 9s²

= R² - (3s)²

= (R+3s)(R-3s)

/* By algebraic identity:

a²-b² = (a+b)(a-b) */

Therefore,

R²- 9s²= (R+3s)(R-3s)

•••♪

Answer 2

(r + 3s) (r - 3s)

Step-by-step explanation:

Given:

r² - 9s²

Making the perfect square:

(r)² - (3s)²

[9 is the perfect square of 3]

Applying the formula: a² - b² = (a + b) (a - b)

(r + 3s) (r - 3s)

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