Penjelasan dengan langkah-langkah:
AKAR AKAR PERSAMAAN KUADRAT
.
x² + 8x + 15
x² + (3x+5x) + (3 × 5)
(x + 3) (x + 5)
untuk
x1 = -3
x2 = -5
Maka akar akarnya adalah -3 dan -5
====================================
CARA LAIN
diperoleh a = 1 , b = 8 , dan c = 15
[tex]\boxed{ \frac{ - b \: \pm \: \sqrt{ {b}^{2} - 4ac} }{2a} }[/tex]
[tex]x = \frac{ - 8 \: \pm \: \sqrt{ {8}^{2} - 4(1)(15) } }{2(1)} \\ \\ x = \frac{ - 8 \: \pm \: \sqrt{{64 - 60} } }{2} \\ \\ x = \frac{ - 8 \: \pm \: \sqrt{4} }{2} \\ \\ x = \frac{ - 8 \: \pm \: 2}{2} \\ \\ untuk \\ x_{1} = \frac{ - 8 + 2}{2} \\ = \frac{ - 6}{2} \\ = - 3 \\ \\ x_{2} = \frac{ - 8 - 2}{2} \\ = \frac{ - 10}{2} \\ = - 5 \\ \\ [/tex]
Maka x1 = -3 dan x2 = -5
Jawaban:
x₁ = - 3
x₂ = - 5
a = 1, b = 8, c = 15
..
[tex]x = \frac{ - 8± \sqrt{ {8}^{2} - 4 \times 1 \times 5 } }{2 \times 1} [/tex]
[tex]x = \frac{ - 8± \sqrt{64 - 60} }{2} [/tex]
[tex]x = \frac{ - 8± \sqrt{4} }{2} [/tex]
[tex]x = \frac{ - 8±2}{2} [/tex]
[tex]x = \frac{ - 8 - 2}{2} \\ x = \frac{ - 8 + 2}{2} [/tex]
[tex]x₁ = - 3 \\ x₂ = - 5[/tex]
[tex]\boxed{\colorbox{ccddff}{Answered by Danial Alf'at}}[/tex]
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Verified answer
Penjelasan dengan langkah-langkah:
AKAR AKAR PERSAMAAN KUADRAT
.
.
x² + 8x + 15
x² + (3x+5x) + (3 × 5)
(x + 3) (x + 5)
untuk
x1 = -3
x2 = -5
Maka akar akarnya adalah -3 dan -5
====================================
CARA LAIN
x² + 8x + 15
.
diperoleh a = 1 , b = 8 , dan c = 15
[tex]\boxed{ \frac{ - b \: \pm \: \sqrt{ {b}^{2} - 4ac} }{2a} }[/tex]
[tex]x = \frac{ - 8 \: \pm \: \sqrt{ {8}^{2} - 4(1)(15) } }{2(1)} \\ \\ x = \frac{ - 8 \: \pm \: \sqrt{{64 - 60} } }{2} \\ \\ x = \frac{ - 8 \: \pm \: \sqrt{4} }{2} \\ \\ x = \frac{ - 8 \: \pm \: 2}{2} \\ \\ untuk \\ x_{1} = \frac{ - 8 + 2}{2} \\ = \frac{ - 6}{2} \\ = - 3 \\ \\ x_{2} = \frac{ - 8 - 2}{2} \\ = \frac{ - 10}{2} \\ = - 5 \\ \\ [/tex]
Maka x1 = -3 dan x2 = -5
Jawaban:
x₁ = - 3
x₂ = - 5
Penjelasan dengan langkah-langkah:
x² + 8x + 15
a = 1, b = 8, c = 15
..
[tex]x = \frac{ - 8± \sqrt{ {8}^{2} - 4 \times 1 \times 5 } }{2 \times 1} [/tex]
[tex]x = \frac{ - 8± \sqrt{64 - 60} }{2} [/tex]
[tex]x = \frac{ - 8± \sqrt{4} }{2} [/tex]
[tex]x = \frac{ - 8±2}{2} [/tex]
[tex]x = \frac{ - 8 - 2}{2} \\ x = \frac{ - 8 + 2}{2} [/tex]
[tex]x₁ = - 3 \\ x₂ = - 5[/tex]
[tex]\boxed{\colorbox{ccddff}{Answered by Danial Alf'at}}[/tex]