alleryCalculate 103 × 97 quickly using an algebraic identity.
A9981
B9999
C9991
D9901
Answer & Solution
Correct answer: C. 9991
Expressing the factors as (100 + 3)(100 - 3) produces 100^2 - 3^2 = 10000 - 9 = 9991.
Keep practising Algebra: expansions
Browse all Algebra: expansions questions for ICSE Class 9, or explore more Mathematics topics.
Related questions
Match each binomial product with its expansion:Match each special conditional cubic identity with its result:Match each cubic identity with its algebraic expansion:Match each three-variable identity with its expanded polynomial:How many rectangular boxes are formed when a cube of side a + b is cut?Find the simplified expression for the cube of (x - 2).Cubing the binomial (x + 2) yields which polynomial?According to the binomial theorem, what does (x + y)^3 expand to?