Question

a^4+b^4−7a^2b^2 . Factorise​

Answer 1

Answer:

Answer

a

4

+b

4

−7a

2

b

2

Above terms can be written as

a

4

+b

4

+2a

2

b62−9a

2

b

2

we know that (a+b)

2

=a

2

+2ab+b

2

[(a

2

)

2

+(b

2

)

2

+(2×a

2

×b

2

)]−(3ab)

2

(a

2

+b

2

)

2

−(3ab)

2

we know that (a+b)

2

=a

2

+2ab+b

2

[(a

2

)

2

+(b

2

)

2

+(2×a

2

×b

2

)]−(3ab)

2

(a

2

+b

2

)

2

−(3ab)

2

We know that a

2

−b

2

=(a+b)(a−b)

(a

2

+b

2

+3ab)(a

2

+b

2

−3ab)

Answer 2

Answer:

-3ab)

is answer

It's right answer!!