Найдите корни уравнений а) x^2-12x-64=0б)x^2-10x+16=0. Created by maxxat50. algebra-ru

Найдите корни уравнений а) x^2-12x-64=0б)x^2-10x+16=0...

MrSolution

Ответ:

Объяснение:

решение внизу

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parus77

Verified answer

Ответ:

(см. объяснение)

Объяснение:

${x}^{2} - 12x - 64 = 0 \\ {x}^{2} + 4x - 16x - 64 = 0 \\ x(x + 4) - 16(x + 4) = 0 \\ (x + 4)(x - 16) = 0 \\ x = - 4 \\ x = 16 \\ \\ {x}^{2} - 10x + 16 = 0 \\ {x}^{2} - 8x - 2x + 16 = 0 \\ x(x - 8) - 2(x -8) = 0 \\ (x - 8)(x - 2) = 0 \\ x = 8 \\ x = 2$

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