Question

teacher i have to ask a question​

Answer 1

Answer:

SOME BASIC ALGEBRAIC FORMULAE:

1.(a + b)2

= a2

+ 2ab+ b2 . 2. (a - b)2

= a2

- 2ab+ b2

.

3.(a + b)3

= a3

+ b3 + 3ab(a + b). 4. (a - b)3

= a3

- b3 - 3ab(a - b).

5.(a + b + c)2

= a2

+ b2

+ c2

+2ab+2bc +2ca.

6.(a + b + c)3

= a3

+ b3

+ c3+3a2

b+3a2

c + 3b2

c +3b2

a +3c2

a +3c2

a+6abc.

7.a2

- b2 = (a + b)(a – b ) .

8.a3

– b3 = (a – b) (a2

+ ab + b2 ).

9.a3

+ b3 = (a + b) (a2

- ab + b2 ).

10.(a + b)2

+ (a - b)2

= 4ab.

11.(a + b)2

- (a - b)2

= 2(a2

+ b2 ).

12.If a + b +c =0, then a3

+ b3

+ c3

= 3 abc .

hope it helps