Question

Розв'яжіть рівняння х2-6х+8. х2-4х+4 =0

Answer 1

${x}^{2} - 6x + 8 = 0 \\ d = 36 - 4 \times 1 \times 8 = 36 - 32 = 4 = {2}^{2} \\ x1 = \frac{6 + 2}{2} = \frac{8}{2} = 4 \\ x2 = \frac{6 - 2}{2} = \frac{4}{2} = 2 \\ \\ \\ {x}^{2} - 4x + 4 = 0 \\ d = 16 - 4 \times 1 \times 4 = 16 - 16 = 0 \\ x1.2 = \frac{4 - + 0}{2} = \frac{4}{2} = 2$