Evaluate please help
Attachments:
Answers
Answered by
0
(205)^2-(195)^2=4000
Answered by
0
(200+5)^2 - (200-5)^2
by identity....
(a+b)^2 & (a-b)^2
= [ 200^2 + 5^2 + 2×200×5 ] - [ 200^2 + 5^2
- 2× 200×5 ]
= (400 + 25 + 2000) - (400 + 25 - 2000)
= 400 + 25 + 2000 - 400 - 25 + 2000
= 2000 + 2000
= 4000
by identity....
(a+b)^2 & (a-b)^2
= [ 200^2 + 5^2 + 2×200×5 ] - [ 200^2 + 5^2
- 2× 200×5 ]
= (400 + 25 + 2000) - (400 + 25 - 2000)
= 400 + 25 + 2000 - 400 - 25 + 2000
= 2000 + 2000
= 4000
mayank1797:
thanks
wlcmm....☺
Similar questions