Question

using identity. find the square (a-b)² or (a+b)²
a) 9998​

Answer 1

Answer:

${(a - b)}^{2} = {a}^{2} + {b}^{2} - 2ab$

9998 = 10000-2

${9998}^ {2} = {(10000 - 2)}^{2} \\ = {10000}^{2} + {2}^{2} - 2 \times 10000 \times 2 \\ = 100000000 + 4 - 40000 \\ = 99,960,004$

99,960,004 is the answer