Question number 22 and 20.

Asked by saxena | 8th Jun, 2017, 02:23: AM

Expert Answer:

begin mathsize 16px style straight a squared open parentheses 1 plus straight b squared close parentheses plus straight b squared open parentheses 1 plus straight c squared close parentheses plus straight c squared open parentheses 1 plus straight a squared close parentheses minus 6 abc
equals straight a squared plus straight a squared straight b squared plus straight b squared plus straight b squared straight c squared plus straight c squared plus straight c squared straight a squared minus 6 abc
equals open parentheses straight b squared straight c squared plus straight a squared minus 2 abc close parentheses plus open parentheses straight c squared plus straight a squared straight b squared minus 2 abc close parentheses plus open parentheses straight b squared plus straight c squared straight a squared minus 2 abc close parentheses
equals open parentheses straight a minus bc close parentheses squared plus open parentheses straight c minus ab close parentheses squared plus open parentheses straight b minus ca close parentheses squared
This space can space not space be space negative space and space only space zero space if space straight a equals bc comma space straight c equals ab comma space straight b equals ca
rightwards double arrow open parentheses straight a minus bc close parentheses squared plus open parentheses straight c minus ab close parentheses squared plus open parentheses straight b minus ca close parentheses squared greater than 0
rightwards double arrow straight a squared open parentheses 1 plus straight b squared close parentheses plus straight b squared open parentheses 1 plus straight c squared close parentheses plus straight c squared open parentheses 1 plus straight a squared close parentheses minus 6 abc greater than 0
rightwards double arrow straight a squared open parentheses 1 plus straight b squared close parentheses plus straight b squared open parentheses 1 plus straight c squared close parentheses plus straight c squared open parentheses 1 plus straight a squared close parentheses greater than 0

Please space post space one space query space at space straight a space time. end style

Answered by Sneha shidid | 8th Jun, 2017, 08:57: AM