Question

9x2-16y^2 use (a^2-b^2)=(a-b)(a+b)​

Answer 1

Step-by-step explanation:

9x

2

−16y

2

=(3x)

2

−(4y)

2

⇒(3x+4y)(3x−4y)

for x=2,y=1

(6+4)(6−4)=

20

Answer 2

Answer:

I think que should be (3x)^2 - (4y)^2 or inverse identity to be used.

Step-by-step explanation:

(3x)^2 - (4y)^2

(3x - 4y)(3x + 4y)  

9x^2 + 12xy - 12xy - 16y^2

= 9x^2 - 16y^2

Mark as brainliest please....✌