Quantitative Aptitude Algebra Quadratic Equation

यदि समीकरण (a2 + b2)x2 - 2(ac + bd)x + (c2 + d2) = 0 के मूल समान हैं, तो निम्नलिखित में से कौन सा सही है?

1
ab = cd
2
ad = bc
3
a2 + c2 = b2 + d2
4
ac = bd

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