Nilai rata-rata dari 5 data berikut: 12, 15, 18, 20, 25 adalah …

x 2 − 6 x = − 9 x 2 − 6 x + 9 = 0 a = 1 , b = − 6 , c = 9 Δ = b 2 − 4 a c = ( − 6 ) 2 − 4 ⋅ 1 ⋅ 9 = 36 − 36 = 0 x o ​ = 2 a − b ​ = 2 6 ​ = 3

Answered by Lilith | 2024-06-10

( a − b ) 2 = a 2 − 2 ab + b 2 <--this is formula x 2 − 6 x + 9 = 0 x 2 − ( 2 ∗ 1 ∗ 3 ) x + 3 2 = 0 a=1,b=3 ( x − 3 ) 2

Answered by MattD | 2024-06-10

We solved the quadratic equation x 2 − 6 x = − 9 by rewriting it in standard form and using the quadratic formula. The discriminant was 0, indicating one real solution, yielding x = 3 . The approximate answer is 3.0 .
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Answered by Lilith | 2024-12-26

Jawaban:18Penjelasan dengan langkah-langkah:[tex] \tt = \frac{12 + 15 + 18 + 20 + 25}{5} [/tex][tex] \tt = \frac{90}{5} [/tex]= 18[tex]\boxed{ \red{ \boxed{\pink{\mathcal{M \frak{ ilana} \purple{ \tt01}}}}}} [/tex]

Answered by Milana01 | 2025-07-07