Question

Find the square without actual multiplication: 98

Answer 1

${98}^{2} = (100 - 2) ^{2}$

$= 100 ^{2} - 2 \times 100 \times 2 + {2}^{2}$

$= 10000 - 400 + 4$

$= 9604$

Answer 2

Answer:

98² can be finded by the formula

(a - b)² = a² - 2ab + b²

98²

= (100-2)²

=100² -2 X 100 X 2 + 2²

= 10000 - 400 + 4

= 9600 + 4

= 9604

I hope it helped you