AR
Amara R
16 Mei 2025 04:58
AR
Amara R
16 Mei 2025 04:58
Pertanyaan
beserta cara ya...
beserta cara ya...
1
2
MW
Muhammad W
17 Mei 2025 15:42
<h2>Kita pindah a nya ke sisi satunya</h2><ul><li>a + b + c = 18 --> 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> </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
· 5.0 (2)
MA
Mikhael A
29 Juni 2025 02:27
2
DD
Dyah D
25 Mei 2025 13:16
<p>dik.</p><p>a + b + c = 18</p><p> 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> 324 – 36a = 756</p><p> – 36a = 756 – 324</p><p> a = 432/–36</p><p> <strong>a = –12 (b.)</strong></p><p> </p><p> </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.)
· 5.0 (1)
MA
Mikhael A
29 Juni 2025 02:27
2
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