Penjelasan dengan langkah-langkah:
PerSamaan KuadRat
1). x² + x - 72 = 0
x² + 9x - 8x - 72 = 0
x(x + 9) - 8(x + 9) = 0
(x - 8)(x + 9) = 0
x1 = 8 atau x2 = -9
.
2). x² - 16x + 60 = 0
x² - 10x - 6x + 60 = 0
x(x - 10) - 6(x - 10) = 0
(x - 6)(x - 10) = 0
x1 = 6 atau x2 = 10
3). 6x² - 5x - 6 = 0
6x² + 4x - 9x - 6 = 0
2x(3x + 2) - 3(3x + 2) = 0
(2x - 3)(3x + 2) = 0
x1 = 3/2 atau x2 = -2/3
4). x² - 25 = 0
x² - 5x + 5x - 25 = 0
x(x - 5) + 5(x - 5) = 0
(x + 5)(x - 5) = 0
x1= -5 atau x2 = 5 → x1,x2 = ±5
5). 3x² - 12x = 0
3x²/3 - 12x/3 = 0
x² - 4x = 0
x(x - 4) = 0
x1 = 0 atau x2 = 4
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Penjelasan dengan langkah-langkah:
PerSamaan KuadRat
1). x² + x - 72 = 0
x² + 9x - 8x - 72 = 0
x(x + 9) - 8(x + 9) = 0
(x - 8)(x + 9) = 0
x1 = 8 atau x2 = -9
.
2). x² - 16x + 60 = 0
x² - 10x - 6x + 60 = 0
x(x - 10) - 6(x - 10) = 0
(x - 6)(x - 10) = 0
x1 = 6 atau x2 = 10
.
3). 6x² - 5x - 6 = 0
6x² + 4x - 9x - 6 = 0
2x(3x + 2) - 3(3x + 2) = 0
(2x - 3)(3x + 2) = 0
x1 = 3/2 atau x2 = -2/3
.
4). x² - 25 = 0
x² - 5x + 5x - 25 = 0
x(x - 5) + 5(x - 5) = 0
(x + 5)(x - 5) = 0
x1= -5 atau x2 = 5 → x1,x2 = ±5
.
5). 3x² - 12x = 0
3x²/3 - 12x/3 = 0
x² - 4x = 0
x(x - 4) = 0
x1 = 0 atau x2 = 4