Question

evaluate 68 square minus 42 square upon 26​

Answer 1

$68 {}^{2} - \frac{42 {}^{2} }{26} \\ = > 68 {}^{2} - \frac{42 \times 42}{26} \\ = > 68 {}^{2} - \frac{42 \times 21}{13} \\ = > 4624 - \frac{882}{13} \\ = > \frac{60112 - 882}{13} \\ = > \frac{59230}{13} \\ = > 4556.1538$

I hope that helps you