a2 - b2 = 88, a - b = 4 అయితే ab యొక్క విలువను కనుగొనండి.

  1. 88
  2. 2√26
  3. 117
  4. 22

Answer (Detailed Solution Below)

Option 3 : 117
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Detailed Solution

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ఇచ్చినది:

a2 - b2 = 88

a - b = 4

ఉపయోగించిన సూత్రం:

a2 - b2 = (a - b)(a + b)

లెక్కింపు:

a - b = 4      ----(1)

(a - b)(a + b) = 88

⇒ 4 × (a + b) = 88

⇒ a + b = 88/4

⇒ a + b = 22      ----(2)

సమీకరణం (1) మరియు సమీకరణం (2) కలుపుతూ, మనకు లభిస్తుంది

⇒ a - b + a + b = 4 + 22

2a = 26

⇒ a = 13

(2) సమీకరణంలో a విలువను ఉంచండి , మనకు లభిస్తుంది

13 + b = 22

⇒ b = 9

ab = 13 × 9 విలువ

Ab = 117

∴ ab విలువ 117.

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