Question

12. 1-2ab-(a2 + b2) = ?
​

Answer 1

Answer:

Given : 1+2ab−(a

2

+b

2

)

We can further write it as

1+2ab−(a

2

+b

2

)=1−(a

2

+b

2

−2ab)

So we get

1+2ab−(a

2

+b

2

)=1

2

−(a−b)

2

Based on the equation a

2

−b

2

=(a+b)(a−b)

We get,

1+2ab−(a

2

+b

2

)=[1+(a−b)][1−(a−b)]

1+2ab−(a

2

+b

2

)=(1+a−b)(1−a+b)

Answer 2

Answer:

$\huge{\bold{\underline{Solution:-}}}$

Given:-

1-2ab-(a2 + b2) = ?

To Find:-

$\implies$ 1-2ab - (a^2+ b^2)

$\implies$ a^2 + b^2- 2a^3b - 2ab^3✔️

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