C. 17 / 17
ExplanationStep 1: Modulus formula is |a+ib|=√(a²+b²). Step 2: √((-8)²+15²)=√289=17. Step 3: In modulus sign becomes positive after squaring.
Step 1: Modulus formula |a+ib|=√(a²+b²) है। Step 2: √((-8)²+15²)=√289=17। Step 3: Modulus में sign square होने पर positive हो जाता है।
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