Explicación paso a paso:
9x + 1 = 7(x²-5) - (x-3)(x+2)
9x + 1 = 7x² - 35 - (x² - x - 6)
9x + 1 = 7x² - 35 - x² + x + 6
0 = 6x² - 8x - 30
0 = 3x² - 4x - 15
0 = (3x+5)(x-3)
Entonces :
3x + 5 = 0
x = -5/3
x - 3 = 0
x = 3
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Explicación paso a paso:
9x + 1 = 7(x²-5) - (x-3)(x+2)
9x + 1 = 7x² - 35 - (x² - x - 6)
9x + 1 = 7x² - 35 - x² + x + 6
0 = 6x² - 8x - 30
0 = 3x² - 4x - 15
0 = (3x+5)(x-3)
Entonces :
3x + 5 = 0
x = -5/3
x - 3 = 0
x = 3