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What is the problem to this a²+27a+72=0

Sagot :

Lilith
[tex]a^2+27a+72=0\\\\a^2+3a+24a+72=0\\\\a(a +3 )+24(a+3)=0\\\\(a+3)(a+24)=0\\\\a+3=0\ \ \vee \ \ a+24=0\\\\a=-3 \ \ \vee \ \ a=-24[/tex]


Panoyin
a² + 27a + 72 = 0
a = -27 +/- √(27² - 4(1)(72))
                     2(1)
a = -27 +/- √(729 - 288)
                     2
a = -27 +/- √441
                2
a = -27+/- 21
             2
a = -27 + 21        a = -27 - 21
             2                         2
a = -6                  a = -48
       2                           2
a = -3                  a = -24
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