Question

Make a formula booklet of chapters 1&2
CLASS 9TH
SUBJECT MATHS
CHAPTERS 1 AND 2
HELP ME

Answer 1

Answer: chapter 2 formulas for class 9 are

(I) a^2 - b^2 = (a-b) (a+b)

(II) (a-b)^2= a^2 + b^2 - 2ab

(III) (a+b)^2 = a^2 + b^2 + 2ab

(IV) (a+b)^3 = a^3+ b^3+3a^2b+3ab^2

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

Step-by-step explanation: