T bl el धु& छह 2 छा el BIE bl 2 (7 —17) (67+39) 1 Libk b – InterviewSolution

1.

T bl el धु& छह 2 छा el BIE bl 2 (7 —17) (67+39) 1 Libk b lalbply °S

Answer»

(4x + 2y) ( 4x - 2y) = (4x)² - (2y)²

= 16x² - 4y²

Jab x = 2 aur y = 1 ho,

(4x + 2y) ( 4x - 2y) = 16 × (2)² - 4 × 1²

= 16 × 4 - 4

= 64 - 4

= 60

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