1.

यदि `a^(2)+b^(2)+c^(2)+3=2(a-b-c)` है तो `2a-b+c` का मान ज्ञात करें।A. 3B. 4C. 0D. 2

Answer» Correct Answer - D
`a^(2)+h^(2)+c^(2)+3=2(a-b-c)`
`a^(2)+b^(2)+c^(2)3-2a+2b+2c=0`
`a^(2)-2a+1+b^(2)+2b+1+c^(2)+2c`
`+1=0`
`(a-1)^(2)+(b+1)^(2)+(c+1)^(2)=0`
`a=1,b=-1, c=-1`
`:. 2a-b+c=2+1-1=2`


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