find using identities
Attachments:
Answers
Answered by
1
1st. (100+2)^2.
(100)^2+(2)^2+2×100×2.
10000+4+400.
10404.
2nd. (100-3)^2.
(100)^2+(3)^2-2×100×3.
10000+9-600.
9409.
3rd. (100-5)^2.
(100)^2+(5)^2-2×100×5.
10000+25-1000.
9025.
4th. (1000+1) (1000-1).
(1000)^2-(1)^2.
1000000-1.
999999.
5th. (60-3) (60+3).
(60)^2-(3)^2.
3600-9.
3591.
rosieeeeeeee:
thankyou so much
it's ok
in which class u read
Similar questions