1.

यदि `x^(2)+1/5x+a^(2)` एक पूर्ण वर्ग है तो `a=?`A. `1/100`B. `+-1/10`C. `1/10`D. `-1/10`

Answer» Correct Answer - C
`x^(2)=1/5x+a^(2)`
`A^(2)+2xxAB+B^(2)=(A+B)^(2)`
`x^(2)+2xx1/10xx x+a^(2)=(x+1/10)^(2)`
`A=x`
`B=1/10`
`B=1/a=1/10`


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