Question

solve the Q82 by using identies

Answer 1

x²-(x+1)²=x+x+1
138+137=275

Answer 2

$use \: a {}^{2} - b { }^{2} = (a + b)(a - b) \\ (138 + 137)(138 - 137) \\ (275)(1) \\ 275 \: \\ \\ hope \: this \: helps \: u \: please \: mark \: brainliest$