Question

Resolver X2 +5x - 14=0

Answer 1

Olá.

$\mathsf{x^{2} + 5x - 14 = 0} \\ \\ \\ \mathsf{\triangle = b^{2} - 4ac} \\ \\ \mathsf{\triangle = 25 - 4 \times 1 \times (-14)} \\ \\ \mathsf{\triangle = 81} \\ \\ \\ \mathsf{x = \dfrac{-b \pm \sqrt{\triangle}}{2a}} \\ \\ \\ \mathsf{x_{1} = \dfrac{-5 + 9}{2} = 2} \\ \\ \\ \mathsf{x_{2} = \dfrac{-5 - 9}{2} = -7} \\ \\ \\ \boxed{\boxed{\boxed{\mathsf{S = \{-7, \: 2\}}}}}$

Bons estudos.

Bons estudos.

Answer 2

x²+5x-14

-5+/- √5² - 4.1.(-14)/2.1 => -5+/- √25+56/2 => -5+/- √81/2
-5+/- 9/2 => x' = 2, x'' = -7

o +/- significa mais ou menos.