Question

$3y^{2} - 8y +4 =0$ $x^{2}-12x+11=0$ Алгебра 8 класс

Answer 1

1) 3у² - 8у + 4 = 0
Д = 64 - 4 × 3 × 4 = 64 - 48 = 16 > 0. √16 = 4.
у1 = 8 + 4 / 6 = 12/6 = 2.
у2 = 8 - 4 / 6 = 6/6 = 1.
Ответ : у1 = 2 ; у2 = 1.
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2) х² - 12х + 11 = 0
Д = 144 - 4 × 1 × 11 = 144 - 44 = 100. √100 = 10.
х1 = 12 + 10 / 2 = 22/2 = 11.
х2 = 12 - 10 / 2 = 2/2 = 1.
Ответ : х1 = 11 ; х2 = 1.

Удачи)))))