Question

Все которые и 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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