यदि a + b = 5 और ab = 6 है, तो 3(a2 + b2) ज्ञात कीजिए।

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SSC CGL 2022 Tier-I Official Paper (Held On : 02 Dec 2022 Shift 2)
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  1. 39
  2. 48
  3. 26
  4. 13

Answer (Detailed Solution Below)

Option 1 : 39
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SSC CGL Tier 1 2025 Full Test - 01
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दिया गया है:

a + b = 5 और ab = 6

प्रयुक्त अवधारणा:

a2 + b2 = (a + b)2 - 2ab

गणना:

3(a2 + b2)

⇒ 3{(a + b)2 - 2ab}

⇒ 3{52 - 2 × 6}

⇒ 39

∴ अभीष्ट मान 39 है।

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