NCERT Solutions for Class 9 Maths Chapter 2
Important NCERT Questions
Polynomials
NCERT Books for Session 2022-2023
CBSE Board and UP Board Others state Board
EXERCISE 2.5
Page No:48
Questions No:2 part:1
Evaluate the following products without multiplying directly: 103 × 107
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(i) 103 x 107
= (100 + 3)(100 + 7)
= (100)² + (3 + 7)100 + 3 x 7 [∵ (x + a)(x + b) = x² + (a + b)x + ab ]
= 10000 + 1000 + 21 = 11021
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