sunnyside
sunnyside
05-03-2015
Mathematics
Answered
What is the problem to this a²+27a+72=0
Answer :
Lilith
Lilith
05-03-2015
[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]
Answer Link
Panoyin
Panoyin
06-03-2015
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
Answer Link
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