state gov MP Excise Constable Mock Test Series 2025 Quantitative Aptitude Algebra Identities

यदि a2 + ab = 21, ab + b2 = -9, और a > b है, तब (a - b) का मान ज्ञात कीजिए।

1
4√2
2
6√3 
3
2√5
4
5√3 
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