Math, asked by jyoti876632, 8 months ago

दो संख्याओं का गुणनफल 192 है और इन दोनों संख्याओं का योग
28 है। इन दोनों संख्याओं में छोटी संख्या क्या है?​

Answers

Answered by deepakdkp7237
4

Answer:

let \: the \: \: a \: and \: b \: the \: number \\ a + b = 28  \:  \: ....(1)\\ ab = 192 \\ a - b =  \sqrt{( {a + b})^{2} - 4ab} \\ a - b =  \sqrt{ {28}^{2} - 4 \times 192 }  \\ a - b =  \sqrt{784 - 768}  \\ a - b =  \sqrt{16}  \\ a - b = 4 \:  \:  \:  \: ....(2) \\ from \: (1) \: and \: (2) \\ 2a = 32  \:  =  > a = 16 \\ b = a - 4 = 16 - 4 = 12

Step-by-step explanation:

Ans:. छोटी संख्या b = 12 है।

Answered by tyrbylent
1

Answer:

12

Step-by-step explanation:

ax² + bx + c = 0

D = b² - 4ac

x_{12} = (- b ± √D) / 2a

~~~~~~~~~~~~

p×q = 192

p + q = 28 ⇒ p = 28 - q

(28 - q)×q = 192

28q - q² = 192

q² - 28q + 192 = 0

D = (- 28)² - 4×192 = 16 = 4²

q_{12} = (- (- 28) ± √16) ÷ 2×1 = (28 ± 4) ÷ 2 = 14 ± 2

q_{1} = 16 , then p_{1} = 12

q_{2} = 12 , then p_{2} = 16

Thus, number are 12 and 16.

Sought-out number is 12

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