ALGEBRA

(a+b)^2 =
1. (a+b) and (a−b)
2. (a^2) − 2ab + (b^2)
3. (a^2) + 2ab + (b^2)
4. (x + a) and (x + b) =
(x +a)(x +b)=
1. (a^2) −(b^2)
2. (a^2) −2ab+(b^2)
3. (a^2) +2ab+(b^2)
4. (x^2) +x(a+b)+ab
(a^2) − 2ab + (b^2) =
1. (a−b)^2
2. (a+b)^2
3. (x +a)(x +b)
4. (a+b)(a−b)
(a+b)(a−b) =
1. (x^2) +x(a+b)+ab
2. (a^2) +2ab+(b^2)
3. (a^2) −2ab+(b^2)
4. (a^2) − (b^2)
(x + a)(x + b)=
If a = - a and b = - b then the identity becomes equal to ?
1. (x^2) + x(b−a) − ab
2. (x^2) − x(a+b) + ab
3. (x^2) + x(a+b) + ab
4. (x^2) + x(a−b) − ab