Question

For x = 5 and y = 2, verify :-
x² - y² = ( x + y ) ( x - y )
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Answer 1

Answer:

(5)2-(2)2

=25-4

21 l.h.s

(5+2)(5-2)

=7*3

=21 r.h.s

l.h.s=r

h.s

hence proved

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Answer 2

Given :-

x = 5

y = 2

To verify :-

x² - y² = ( x + y ) ( x - y )

Solution :-

5² - 2² = ( 5 + 2 ) ( 5 - 2 )

25 - 4 = ( 7 ) ( 3 )

21 = 21

L.H.S = R.H.S

Hence verified!

Learn more :-

• ( a + b )² = a² + b² + 2ab
• ( a - b )²  = a² + b² - 2ab
• ( a² + b² ) = ( a + b )² - 2ab

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