Question

5x^2-16x+12=0 але елена

Answer 1

Ответ:

$x1 = 2 \\ x2 = 1.2$

Объяснение:

$5x {}^{2} - 16x + 12 = 0 \\ a = 5 \\ b = - 16 \\ c = 12 \\ \\ d = b {}^{2} - 4ac \\ d = ( - 16) {}^{2} - 4 \times 5 \times 12 = 256 - 240 = 16 \\ \\ x = \frac{ - b + - \sqrt{d} }{2a} \\ \\ x = \frac{ - ( - 16) + - 4}{10} \\ \\ x1 = \frac{20}{10} = 2 \\ \\ x2 = \frac{12}{10} = 1.2$