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CS = (-2; 2)
4x² - 16 = 0 factorizas diferencia de cuadrados.
Aplicas a² - b² = (a + b)(a - b)
2x² - 4² =
(2x + 4)(2x - 4) = 0 Tiene como solucion 2 raices reales
2x + 4 = 0
2x = - 4
x = - 4/2
x = - 2
o
2x - 4 = 0
2x = 4
x = 4/2
x = 2
Solución.
(- 2 , 2)
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Otra solución.
Por formula general.
4x² - 16 = 0
a = 4
b = 0
c = - 16
Formula.
x = [- b +/-√(b² - 4ac)]/2a
x = [- (- 0 )+/-√(0 - 4(4)(-16))]/2(4)
x = [+/-√256]/8
x = + /- (16)/8
x₁ = 16/8
x₁ = 2
o
x₂ = - 16/8
x₂ = -2
Solución.
( - 2 , 2)