Question

98 ²(7) (103)² using identities​

Answer 1

6924484

step-by-step solution:

$98 {}^{2} (7)(103) \\ = (100 - 2) {}^{2} ( 7)(100 + 3) \\ = (10000 - 400 + 4)(7)(100 + 3) \\ = (9604)(7)(100 + 3) \\ = 67228(100 + 3) \\ = 6722800 + 201684 \\ = 6924484$