Amara R

16 Mei 2025 04:58

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Amara R

16 Mei 2025 04:58

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Muhammad W

17 Mei 2025 15:42

<h2>Kita pindah a nya ke sisi satunya</h2><ul><li>a + b + c = 18 --&gt; b + c = 18 - a</li></ul><h2>Kita kuadratkan kedua ruas</h2><ul><li>(b + c)<sup>2 </sup>= (18 - a)<sup>2</sup></li><li>b<sup>2 </sup>+ c<sup>2 </sup>+ 2bc = 324 - 36a + a<sup>2</sup></li><li>b<sup>2 </sup>+ c<sup>2 </sup>+ bc + bc = 324 - 36a + a<sup>2</sup></li></ul><h2>Karena bc = a<sup>2 </sup>maka</h2><ul><li>b<sup>2 </sup>+ c<sup>2 </sup>+ a<sup>2</sup> + a<sup>2</sup> = 324 - 36a + a<sup>2</sup></li><li>b<sup>2 </sup>+ c<sup>2 </sup>+ a<sup>2</sup> = 324 - 36a</li></ul><h2>Karena a<sup>2</sup> + b<sup>2 </sup>+ c<sup>2 </sup>= 756 maka</h2><ul><li>756 = 324 - 36a</li><li>756 - 324 = -36a</li><li>432 = -36a</li><li>a = 432/(-36)</li><li><strong>a = -12</strong></li></ul><p>&nbsp;</p><h1>Jadi a = -12</h1>

Kita pindah a nya ke sisi satunya

  • a + b + c = 18 --> b + c = 18 - a

Kita kuadratkan kedua ruas

  • (b + c)2 = (18 - a)2
  • b2 + c2 + 2bc = 324 - 36a + a2
  • b2 + c2 + bc + bc = 324 - 36a + a2

Karena bc = a2 maka

  • b2 + c2 + a2 + a2 = 324 - 36a + a2
  • b2 + c2 + a2 = 324 - 36a

Karena a2 + b2 + c2 = 756 maka

  • 756 = 324 - 36a
  • 756 - 324 = -36a
  • 432 = -36a
  • a = 432/(-36)
  • a = -12

 

Jadi a = -12


Mikhael A

29 Juni 2025 02:27

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Dyah D

25 Mei 2025 13:16

<p>dik.</p><p>a + b + c = 18</p><p>&nbsp; &nbsp; &nbsp;b + c = 18–a</p><p>a² = bc</p><p>b²+c² = (b+c)²–2bc</p><p>jdi,</p><p>a² + b² + c² = 756</p><p>a² + (b+c)² – 2bc = 756</p><p>a² + (18–a)² – 2a² = 756</p><p>–a² + 324 – 36a + a² = 756</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;324 – 36a = 756</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;– 36a = 756 – 324</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;a = 432/–36</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<strong>a = –12 (b.)</strong></p><p>&nbsp;</p><p>&nbsp;</p>

dik.

a + b + c = 18

     b + c = 18–a

a² = bc

b²+c² = (b+c)²–2bc

jdi,

a² + b² + c² = 756

a² + (b+c)² – 2bc = 756

a² + (18–a)² – 2a² = 756

–a² + 324 – 36a + a² = 756

             324 – 36a = 756

                   – 36a = 756 – 324

                         a = 432/–36

                         a = –12 (b.)

 

 


Mikhael A

29 Juni 2025 02:27

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