Algebraic Identities For Class 9

Algebra is a part of Mathematics in which general symbols and letters are used to represent quantities and numbers in equations and formulae. There are two parts in algebra – Elementary algebra and Modern algebra (Abstract algebra). Algebra formulas for class 9 include formulas related to algebra identities or expressions.

Algebra Identities chapter is introduced in CBSE class 9. This is a little tricky chapter where one needs to learn all the formula and apply them accordingly. To make easy for them, we at Byju’s provide all the formulas on a single page. We believe, algebra formulas for class 9 will help students to score better marks in mathematics.

Algebra Formulas List is given below. Have a look at it.

Algebraic Identities For Class 9
(a+b)2=a2+2ab+b2
(ab)2=a22ab+b2
(a+b)(ab)=a2b2
(x+a)(x+b)=x2+(a+b)x+ab
(x+a)(xb)=x2+(ab)xab
(xa)(x+b)=x2+(ba)xab
(xa)(xb)=x2(a+b)x+ab
(a+b)3=a3+b3+3ab(a+b)
(ab)3=a3b33ab(ab)
(x+y+z)2=x2+y2+z2+2xy+2yz+2xz
(x+yz)2=x2+y2+z2+2xy2yz2xz
(xy+z)2=x2+y2+z22xy2yz+2xz
(xyz)2=x2+y2+z22xy+2yz2xz
x3+y3+z33xyz=(x+y+z)(x2+y2+z2xyyzxz
x2+y2=1/2[(x+y)2+(xy)2]
(x+a)(x+b)(x+c)=x3+(a+b+c)x2+(ab+bc+ca)x+abc
x3+y3=(x+y)(x2xy+y2)
x3y3=(xy)(x2+xy+y2)
x2+y2+z2xyyzzx=1/2[(xy)2+(yz)2+(zx)2]