Question

evaluate a2+b2+c2-ab-bc-ca when a=22,b=20&c=18..
ans:12
if ur answer is correct i will make it brainliest​

Answer 1

Answer:

12

Step-by-step explanation:

22^(2)+20^(2)+18^(2)−22×20

−20×18−18×22

=12

Answer 2

Step-by-step explanation:

Solution :

a² + b² + c²- ab - bc - ca

★ (22)² + (20)² + (18)² - (22×20) - (20×18) - (18×22)

★ 485 + 400 + 324 - 440 - 360 - 396

★ 885 + 324 - 800 - 396

★ 1209 - 1196

★ 13.