Question

a) Halla las soluciones de la siguiente ecuación
x2 + 5x - 4 = 10​

Answer 1

x^2 + 5x - 4 = 10

x^2 + 5x -4 -10 = 0

x^2 + 5x - 14 = 0

a = 1

b = 5

c = -14

$\frac{-5\sqrt{5^{2} - 4 .1.(-14)} }{2} = \frac{-5 \sqrt{25 + 56} }{2} = \frac{-5 \sqrt{81} }{2} = \frac{-5 (+-) 9}{2}$

$x_{1} = 4/2 = 2 \\x_{2} = -14/2 = -7$