Question

how to solve this question is evaluate putting the value of x and y in equation and solve this

Answer 1

HELLO DEAR,

GIVEN:-

x = √7 + √5

x² = 7 + 5 + 2√35 = 12 + 2√35---------( 1 )

y = √7 - √5.

y² = 7 + 5 - 2√35 = 12 - 2√35---------( 2 )

subtracting------( 1 ) & -------( 2 )

we get,

x² - y² = (12 + 2√35) - (12 - 2√35)

x² - y² = 12 - 12 + 2√35 + 2√35

(x² - y²) = 4√35

on squaring both side,

(x² - y²)² = (4√35)²

(x² - y²)² = 16 × 35

(x² - y²)² = 560

I HOPE ITS HELP YOU DEAR,

THANKS