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Vinvika [58]
3 years ago
6

Can the equation have a positive root: (x+5)(x+6)+9=0

Mathematics
1 answer:
mafiozo [28]3 years ago
8 0

Answer:

  no

Step-by-step explanation:

In expanded form, the equation is ...

  x^2 +11x +39 = 0

The discriminant is ...

  11^2 -4(1)(39) = -35

It is negative, so there are only complex roots.

_____

Descartes' rule of signs tells you there are zero positive real roots, because there are zero sign changes in the coefficients.

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natali 33 [55]

Answer:

The answer is C 18

Step-by-step explanation:

4^2+8/4= 16+2=18

3 0
4 years ago
<img src="https://tex.z-dn.net/?f=3%28x%20%2B%205%29%20%5Cleqslant%203x%20%2B%2018" id="TexFormula1" title="3(x + 5) \leqslant 3
klemol [59]

3(x+5)\leq 3x+18\\\\3x+15\leq 3x+18\\\\15\leq 18\\\\x\in\mathbb{R}

8 0
3 years ago
What is 9x+2x - 8 equivalent to after being simplified
lys-0071 [83]

First combine like terms.

9x + 2x = 11x.

That's all you have to do!

Your final answer is 11x - 8!

Have a nice day :)

6 0
3 years ago
Solve the following inequality.<br> -8&lt;3x + 1 &lt;7
lakkis [162]

Answer: -3 < x < 2

Step-by-step explantion

8 0
3 years ago
A radio active isotope decays according to the exponential decay equation where t is in days. Round to the thousandths place. Th
Whitepunk [10]
To calculate the value of the half life we proceed as follows;
a/2=ae^(-2.360t)
the a(s) will cancel and we shall remain with:
1/2=e^-2.360t
introducing the natural logs we get:
ln (1/2)=ln e^(-2.360t)
ln(1/2)=-2.360t
hence;
t=(ln 0.5)/(-2.360)
t=0.294
the answer is t=0.294
8 0
3 years ago
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