Question

say the question answer​

Answer 1

Answer:

$58 {}^{2} - 42 {}^{2}$

=(58+42) (58-42)

=(100) (16)

=1600

Ans is 1600.

Verification

$58 ^{2} - 42{}^{2}$

=3364-1764

=1600

Answer 2

given

$x {}^{2} - y {}^{2} = (x + y)(x - y)$

therefore

$58 {}^{2} - 42 {}^{2}$

= (58+42)(58-42)

=(100)(16)= 1600

Hope it helps you