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Tatiana [17]
4 years ago
8

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

Mathematics
2 answers:
zlopas [31]4 years ago
7 0
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


Vinil7 [7]4 years ago
6 0
A² + 27a + 72 = 0
a = <u>-27 +/- √(27² - 4(1)(72))</u>
                     2(1)
a = <u>-27 +/- √(729 - 288)</u>
                     2
a = <u>-27 +/- √441
</u>                2
a = <u>-27+/- 21</u>
             2
a = <u>-27 + 21</u>        a = <u>-27 - 21</u>
             2                         2
a = <u>-6</u>                  a = <u>-48</u>
       2                           2
a = -3                  a = -24
<u />
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