Question

varog am nevoie de ajutor urgent dau coroana si multe puncte:

10 ex a+b^2
10 ex a-b^2
10 ex a^2-b^2 varog sa fie corecte... imi trebuie corecte.
Mulțam!

Answer 1

a)1. (5+6)^2=5^2+2×5×6+6^2=25+60+36=85+36=121
2. (12+4)^2=12^2+2×12×4+4^2=144+96+16=256
3. (2+9)^2=2^2+2×2×9+9^2=4+36+81=121
4. (6+2)^2=6^2+2×6×2+2^2=36+24+4=64
5. (7+3)^2=7^2+2×7×3+3^2=49+42+9=100
6. (13+18)^2=13^2+2×13×18+18^2=169+468+324=961
7. (10+6)^2=10^2+2×10×6+6^2=100+120+36=256
8. (20+11)^2=20^2+2×20×11+11^2=400+440+121=961
9. (41+8)^2=41^2+2×41×8+8^2=1681+90+64=1835
10. (19+3)^2=19^2+2×19×3+3^2=361+114+9=484

b) 1. (5-2)^2=5^2-2×5×2+2^2=25-20+4=9
2. (18-6)^2=18^2-2×18×6+6^2=324-216+36=144
3. (20-10)^2=20^2-2×20×10+10^2=400-400+100=100
4. (13-4)^2=13^2-2×13×4+4^2=169-104+16=81
5. (16-8)^2=16^2-2×16×8+8^2=256-256+64=64
6. (25-13)^2=25^2-2×25×13+13^2=625-650+169=144
7. (30-8)^2=30^2-2×30×8+8^2=900-480+64=484
8. (51-20)^2=51^2-2×51×20+20^2=2601-2040+400=961
9. (24-16)^2+=24^2-2×24×16+16^2=576-768+256=64
10. (15-9)^2=15^2-2×15×9+9^2=225-270+81=36

c. 1. 3^2-4^2=(3-4)×(3+4)=-1×7=-7
2. 6^2-2^2=(6-2)×(6+2)=4×8=32
3. 10^2-5^2=(10-5)×(10+5)=5×15=75
4. 18^2-5^2=(18-5)×(18+5)=13×23=299
5. 12^2-8^2=(12-8)×(12+8)=4×20=80
6. 30^2-16^2=(30-16)×(30+16)=14×46=644
7. 13^2-9^2=(13-9)×(13+9)=4× 22=88
8. 9^2-9^2=(9-9)×(9+9)=0×81=0
9. 27^2-4^2=(27-4)×(27+4)=23×31=713
10. 19^2-9^2=(19-9)×(19+9)=10×28=280

Sper că ți-am fost de folos! ;)