Question

calcule a raiz de 2x² + x -10 = 0 me ajudem quero saber a delta e o x

Answer 1

2x ² + x - 10 = 0

a = 2

b = 1

c = -10

Δ = (1 ²) - 4 . 2 . -10

Δ = 1 + 80

Δ = 81

X = -(1) +- √81 / 2 . 2

X = -1 + 9 / 4 = 8 / 4 = 2

X = - 1 - 9 / 4 = -10 / 4 = -2,5

S = {2, -2,5}

Answer 2

2x² +x -10 = 0

a = Coeficiente de x²

a = 2

b = Coeficiente de x

b = 1

c = valor

c= -10

$\Delta = b^{2} -4ac$

1² -4*-10*2

1 +80

81

Fatoração.

81 | 9

9 | 9

1 |

81 = 9²

$x = \frac{-b \pm \sqrt{\Delta} }{2a}$

-1 ± √9²/2*2

-1 ± 9/4

x'

-1 + 9/4

8/4

2

x''

-1 -9/4

-10/4

-5/2

{2 , -5/2}