Question

Отдам все баллы которые есть...
Срочно и очень легко но я овощ

№1)

2x^+4x+3=0

№2)

а)15-5x^=0
б)10x^-2x=0

№3)

а)2x^-7x+6=0
б)x^+1=2x-2

Answer 1

$1)2 {x}^{2} + 4x + 3 = 0 \ d = 16 - 4 times 2 times 3 = 16 - 24 = \ - 8$
Нет решения

2)
$a)15 - 5 {x}^{2} = 0 \ 5 {x}^{2} = 15 \ {x}^{2} = 3 \x1 = sqrt{3 }$
$x2 = - sqrt{3}$
б)
$10 {x}^{2} - 2x = 0 \ 2x(5x - 1) = 0 \ 2x = 0 \ x = 0$
$5x - 1 = 0 \ 5x = 0 + 1 \ 5x = 1 \ x = 1 div 5 = frac{1}{5} = 0.2$
3)
а)
$2 {x}^{2} - 7x + 6 = 0 \ d = 49 - 4 times 2 times 6 = \ 49 - 48 = 1$
$x1 = frac{7 + 1}{4} = frac{8}{4} = 2 \ x2 = frac{7 - 1}{4} = frac{6}{4} = 1 frac{2}{4} = 1.5$
б)
${x}^{2} + 1 - 2x + 2 = 0 \ {x}^{2} - 2x + 3 = 0 \ d = 4 - 12 = - 8$
Нет решения

Answer 2

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