Question

Write important formula of class 7
maths​

Answer 1

Answer:

a^ -n = 1/a^n

a^m * a^n = a^(m+n)

a^m/a^n = a^(m-n)

(a^m)^n = a ^mn

(a+b)² = a²+b²+2ab

(a-b) ² = a²+b²-2ab

(a+ 1/a)² = a²+1/a²+2

(a-1/a)²= a²+1/a²-2

(a+b)³ = a³+b³+3a²b +3ab²