Question

The factors of 9x^2– 25y^2 are
(a) (3x + 5y) (3x + 5y)
(c) (3x + 5y) (3x - 5y)
(b) (-3x + 5y) (3x - 5y)
(d) none of these
​

Answer 1

Answer:

C

Step-by-step explanation:

9x^2-25y^2

={3x}^2-{5y}^2. {a^2-b^2=(a+b)(a-b)

=(3x+5y)(3x-5y)

Answer 2

Answer:

(c)

$(3x + 5)(3x - 5)$

Step-by-step explanation:

$9x ^{2} - 25 {y}^{2}$

using x² - y²= (x+y)(x-y)

$= (3 {x}^{2} ) - (5{y}^{2} ) \\ = (3x + 5y)(3x - 5y)$