Ayudenme con estas formulas general para resolver ecuaciones de segundo grado - 0, 5×2 + 2× + 1, 5 = 0 y el otro ×2 - 3× - 4 = 0?

<img src="https://tex.z-dn.net/?f=%20x%5E%7B2%7D%20-3x-4%3D0" />

<img src="https://tex.z-dn.net/?f=%28x-3%29%28x-1%29%3D0" /><img src="https://tex.z-dn.net/?f=%20x1%20%3D%20%2B3%0A%20x2%20%3D%20%2B1%5C%5CCon%20formula%20general%5C%5Cx%3D%20%5Cfrac%7B-b%20%5Csqrt%7B%20b%5E%7B2%7D-4ac%7D%20%20%7D%7B2a%7D%20" />

a = - 0.

5

b = 2

c = 1.

5 a b c

<img src="https://tex.z-dn.net/?f=-0.5%20x%5E%7B2%7D%20%2B2x%2B1.5%20%3D%200" />

<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B-%282%29%20%5Csqrt%7B%20%282%29%5E%7B2%7D-4%28-0.5%29%281.5%29%7D%20%20%7D%7B2%28-0.5%29%7D%20" />

<img src="https://tex.z-dn.net/?f=x%3D%20%5Cfrac%7B-2%20%5Csqrt%7B%204%2B3%7D%20%20%7D%7B-1%7D%20" />

<img src="https://tex.z-dn.net/?f=x%3D%20%5Cfrac%7B-2%20%5Csqrt%7B7%7D%20%20%7D%7B-1%7D%20" />

<img src="https://tex.z-dn.net/?f=x%3D%20%5Cfrac%7B-2%20%2B-%20%282.45%29%7D%7B-1%7D%20" />

<img src="https://tex.z-dn.net/?f=x1%3D%20%5Cfrac%7B-2%20%2B2.45%7D%7B-1%7D%20%3D%20%20%5Cfrac%7B.45%7D%7B-1%7D%20%3D%200.45%20" />

<img src="https://tex.z-dn.net/?f=x1%3D%20%5Cfrac%7B-2%20-2.45%7D%7B-1%7D%20%3D%20%20%5Cfrac%7B-4.45%7D%7B-1%7D%20%3D%204.45%20" />.