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Tatiana [17]
3 years ago
8

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

Mathematics
2 answers:
zlopas [31]3 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]3 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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Answer:

58 in^2.

Step-by-step explanation:

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3 years ago
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slava [35]

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Simplified:

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soldier1979 [14.2K]

Answer:

we have:

8x³ + mx² - 6x + n

= 8x³ - 8x² + (m + 8)x²- (m + 8)x + (m + 2)x - (m + 2) + m + 2+ n

= 8x²(x - 1) + (m + 8)x(x - 1) + (m + 2)(x - 1) + (m + n + 2)

= (x - 1)[8x² + (m + 8)x + m + 2] + (m + n + 2)

because the remainder if divided by (x-1) is 2

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we also have:

8x³ + mx² - 6x + n

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= 4x²(2x - 3) + 1/2.(m + 12)x(2x - 3) + (3/2m + 12).1/2.(2x - 3) + 9/4m + n + 18

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=> 9/4m + n + 18 = 8

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from (1) and (2), we have:

m + n = 0

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=> m = -8

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Step-by-step explanation:

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3 years ago
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Step-by-step explanation:

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