Question

Solve this Pls . It's a class 9th Question​

Answer 1

Answer:

(B). (ii)

(C). (i)

answer is here

Answer 2

Answer:

A) i) a+b

B) ii) x^3 - y^3 - 3xy(x-y)

C) i) polynomial

D) iii) 970 Rs

E) iv) 322 Rs

Step-by-step explanation:

A) i) a+b

B) ii) x^3 - y^3 - 3xy(x-y)

C) i) polynomial

D) iii) x + 1/x = 10

(x + 1/x)^3 = 10^3

x^3 + (1/x)^3 + 3*x*1/x( x+ 1/x) = 1000

x^3 + (1/x)^3 + 3 * 10 = 1000

x^3 + (1/x)^3 = 1000 - 30

x^3 + (1/x)^3 = 970 Rs

E) iv) x + 1/x = 7

(x + 1/x)^3 = 7^3

x^3 + (1/x)^3 + 3*x*1/x( x+ 1/x) = 343

x^3 + (1/x)^3 + 3 * 7 = 343

x^3 + (1/x)^3 = 343 - 21

x^3 + (1/x)^3 = 322 Rs