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fenix001 [56]
2 years ago
7

Solve for x -

exFormula1" title=" x^{2} + 5x + 6 = 0 \\ \\ " alt=" x^{2} + 5x + 6 = 0 \\ \\ " align="absmiddle" class="latex-formula">

ty! :)​
Mathematics
1 answer:
Volgvan2 years ago
3 0

Hello,

x² + 5x + 6 = 0

a = 1 ; b = 5 ; c = 6

∆ = b² - 4ac = 5² - 4 × 1 × 6 = 25 - 24 = 1 > 0

2 solutions :

x_{1} =  \frac{ - b -  \sqrt{\Delta} }{2a}  =  \frac{ - 5 - 1}{2 \times 1}  =  \frac{ - 6}{2}  =  - 3

x_{2} =  \frac{ - b  +   \sqrt{\Delta} }{2a}  =  \frac{ - 5  + 1}{2 \times 1}  =  \frac{ - 4}{2}  =  - 2

S = { -3 ; -2}

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