Question

x²-y² = (x+y)(x-y) . Using this, find 58²-42²​

Answer 1

Answer:

here a = 58 & b = 42

it is in the form of a²-b²

so,

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

$= (58 + 42)(58 - 42)$

$= 100 \times 16$

$= 1600$