Question

evaluate using suitable identity 112×112 - 98×98​

Answer 1

Answer:

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112×112= (100+12)²

= 100²+2×100×12+12²

= 10000+2400+144

= 12544

98×98= (100-2)²

= 100²-2×100×2+2²

=10000-400+4

= 9604

12544-9604

= 2940

Answer 2

${\huge{\bf{\red{⚘Answer⚘}}}}$

112 × 112 = (100+12)²

= 100² +2 × 100 × 12 + 12²

= 10000 + 2400 + 144

= 12544

98 × 98 (100-2)²

= 100²- 2 × 100 × 2 + 2²

=10000 - 400 + 4

= 9604

12544 - 9604

= 2940