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81x² = 9
x² = 9/81
x² = 1/9
x = √1/9 Tiene 2 soluciones
x = 1/3
o
x = - 1/3
Solucion.
(1/3 , - 1/3)
Con formula.
81x² = 9
81x² - 9 = 0
a = 81
b = 0
c = -9
x = [- b+/- √(b² - 4ac)]/2a
x = [ - 0 +/-√(0 - 4(81)(-9)] (2*81)
x = [+/-√(2916)]/162
x = +/-54 /162
x = +/- 1/3
x1 = 1/3
x 2 = - 1/3
Solucion.
(1/3 , - 1/3)