Question

решите пж
8 класссссссссс​

Answer 1

Ответ:

1) 18*(1/9)^2 - 20*1/9 = (1/9)(18/9 - 20) = (1/9)(-18)= -2

2)

x^2=2x+8

x^2-2x-8=0

D/4 = 1+8 = 9

$\sqrt{D} = \sqrt{1+8} = \sqrt{9} =$ ±3

x1 = 1+3 = 4

x2 = 1-3 = -2

Answer 2

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