Podrian ayudarme porfa 12x² - 3 = 12x?

<img src="https://tex.z-dn.net/?f=12%20x%5E%7B2%7D%20-3%3D12x%20%5C%5C%20%5C%5C%202x%5E2-12x-3%3D0%20%5C%5C%20%5C%5C%20%5Ctextbf%7BFormula%20general%3A%7D%20%5C%5C%20%5C%5C%20x_%7B1%2C%5C%3A2%7D%3D%5Cdfrac%7B-b%5Cpm%20%5Csqrt%7Bb%5E2-4ac%7D%7D%7B2a%7D%20%20%5C%5C%20%5C%5C%20%20a%3D12%2C%5C%3Ab%3D-12%2C%5C%3Ac%3D-3%20%5C%5C%20%5C%5C%20%5Ctextbf%7BReemplazamos%3A%7D%20%5C%5C%20%5C%5C%20x_%7B1%2C%5C%3A2%7D%3D%5Cdfrac%7B-%5Cleft%28-12%5Cright%29%5Cpm%20%5Csqrt%7B%5Cleft%28-12%5Cright%29%5E2-4%5Ccdot%20%5C%3A12%5Cleft%28-3%5Cright%29%7D%7D%7B2%5Ccdot%20%5C%3A12%7D%20" />

<img src="https://tex.z-dn.net/?f=%5Ctextbf%7BResolvemos%20la%20positiva%3A%7D%20%5C%5C%20%5C%5C%20x_1%3D%20%5Cdfrac%7B12%2B%5Csqrt%7B%5Cleft%28-12%5Cright%29%5E2-4%5Ccdot%20%5C%3A12%5Cleft%28-3%5Cright%29%7D%7D%7B2%5Ccdot%20%5C%3A12%7D%20%5C%5C%20%5C%5C%20x_1%3D%5Cdfrac%7B12%2B%5Csqrt%7B288%7D%7D%7B24%7D%20%3D%20%5Cdfrac%7B1%2B%5Csqrt%7B2%7D%7D%7B2%7D%20%20%5C%5C%20%5C%5C%20%5Cboxed%7Bx_1%3D%20%5Cfrac%7B1%2B%5Csqrt%7B2%7D%7D%7B2%7D%7D" />

<img src="https://tex.z-dn.net/?f=%5Ctextbf%7BResolvemos%20la%20negativa%3A%7D%20%5C%5C%20%5C%5C%20x_2%3D%5Cdfrac%7B12-%5Csqrt%7B288%7D%7D%7B24%7D%20%3D%20%5Cdfrac%7B1-%5Csqrt%7B2%7D%7D%7B2%7D%20%5C%5C%20%5C%5C%20%5Cboxed%7Bx_2%20%3D%20%3D%5Cfrac%7B1-%5Csqrt%7B2%7D%7D%7B2%7D%7D" />

¡Espero haberte ayudado, saludos.

G. G.

H! .