Question

Evaluate (998)3 using identities

Answer 1

Step-by-step explanation:

(995+3)^2(a+b)^2=a^2+b^2+2ab

995^2+3^2+2(995)(3)

990025+9+5970

=990064

Answer 2

Step-by-step explanation:

(1000-2)³

(a-b) ³=a³-b³-3a²b+3ab²

(1000)³-2³-3(1000)²(2)+3(2²)(1000)

1000000000-8-6000000+12000

1000012000-5,999,992=94,001,208