Question

a square + 2ab + b square - 9 using suitable identities please please give me answer​

Answer 1

Answer:

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Step-by-step explanation:

a²+2ab+b-9

Using Identity : (a+b)²=a²+b²+2ab

We get : a²+2ab+b²-9

= (a+b)²-9

Now , 9 can be expressed as (3)²

And Using Identity : a²-b²=(a+b)(a-b)

We get: (a+b)²-9

= (a+b)²-(3)²

= (a+b+3)(a+b-3)

Answer 2

Answer:

(a+b+3)([a+b]-3)

Step-by-step explanation:

asquare + bsquare + 2ab = (a + b)square

so,

by using identity -

(a + b)square  -   3square

by using identity that is

a2 - b2 = (a+b)(a-b)

use this identity in the equation -

(a+b+3)([a+b]-3)