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4x² - 15 = 49
4x² = 49+15
4x² = 64
x² =64/4
x² = 16
x =+- √16
x₁ =+4
x₂ = -4
Saludos
4x² - 15 = 49
4x² = 49 + 15
4x² = 64
x² = 64/4
x² = 16
x = √16 Tiene 2 soluciones reales
x = 4 Porque 4 * 4 = 16
o
x = - √16
x = - 4 Porque ( - 4)( - 4) = 16
Solucion.
(4 , - 4)