Question

помогите пж.
заранее спасибо

Answer 1

1.
${x}^{2} - 26x + 25 = 0 \\ {x}^{2} - x - 25x + 25 = 0 \\ (x - 1) \times (x - 25) = 0 \\ x - 1 = 0 \\ x - 25 = 0 \\ x 1 = 1 \\ x2 = 25$

2.
${x}^{2} + 24x - 25 = 0 \\ x \times (x + 25) - (x + 25) = 0 \\ (x + 25) \times (x - 1) = 0 \\ x + 25 = 0 \\ x - 1 = 0 \\ x = - 25 \\ x = 1 \\ x1 = - 25 \\ x2 = 1$
3.
${x}^{2} + 8x + 6 = 0 \\ x1 = - 4 - \sqrt{10} \\ x2 = - 4 + \sqrt{10}$

4.
${x}^{2} - 7x + 10 = 0 \\ {x}^{2} - 2x - 5x + 10 = 0 \\ x \times (x - 2) - 5 \times (x - 2) = 0 \\ (x - 2) \times (x - 5) = 0 \\ x - 2 = 0 \\ x - 5 = 0 \\ x1 = 2 \\ x2 = 5$
5. там через дискриминат,не думаю,что вы ещё такое изучали