Question

Algerabriac identities of class 8 standard

Answer 1

1.(a+b)^2 =a^2+2ab+b^2.
2.(a-b)^2=a^2-2ab+b^2.
3.a^2-b^2=(a+b)(a-b)

Answer 2

Heya!!
Here is your answer:-
Here are some of the algebraic identities which are helpful to a 8th standard student and are taught in the school:-
1.
${(x + y)}^{2} = {x}^{2} + {y}^{2} + 2xy$
2.
${(x - y)}^{2} = {x}^{2} + {y}^{2} - 2xy$
3.
$(x + y)(x - y) = {x}^{2} - {y}^{2}$
4.
$(x + a)(x + b) = {x}^{2} + (a + b)x + a \times b$

=> Note :- If you are studying in an CBSE board school then only first three are taught and they are important , and if you are studying in an CISCE i.e. ICSE board school then all of the four identities are in the syllabus and they are very important.

Hope it helps you.