Practice free →
Home › CBSE Class 9 › mathematics › algebraicidentities › Compute 98² using an identity:

Compute 98² using an identity:

A9604
B9504
C9404
D9904
Answer & Solution
Correct answer: A. 9604
98² = (100 − 2)² = 100² − 2·100·2 + 2² = 10000 − 400 + 4 = 9604.
Solve this in the app — CBSE Class 9 practice & 24k+ MCQs →
Related questions
Expand (2x + 3y)²:Is (a + b)² > a² + b² always true for non-zero a, b?Find (x − 1/x)² if x + 1/x = 4:If a + b = 7 and a − b = 3, find a² − b²:Find the value of x² + y² if x + y = 10 and xy = 21:Factorise: 9x² − 25y²:Compute 47 × 53 using an identity:Use an identity to compute 102² quickly: