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disa [49]
3 years ago
14

X^2+15x=-45 solve by factoring

Mathematics
2 answers:
Julli [10]3 years ago
6 0

1 Move all terms to one side.

{x}^{2}+15x+45=0

x

2

+15x+45=0

2 Use the Quadratic Formula.

x=\frac{-15+3\sqrt{5}}{2},\frac{-15-3\sqrt{5}}{2}

x=

2

−15+3

5

,

2

−15−3

5

3 Simplify solutions.

x=-\frac{3(5-\sqrt{5})}{2},-\frac{3(5+\sqrt{5})}{2}

x=−

2

3(5−

5

)

,−

2

3(5+

5

)

harina [27]3 years ago
4 0

Answer:

x =  - \frac{15-3\sqrt{5} }{2}; - \frac{15+3\sqrt{5} }{2}

Step-by-step explanation:

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Step-by-step explanation:

very simple...

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Hope this helped!

7 0
3 years ago
The total weight of a fully loaded coal truck is 4 tons. The ratio of the weight of the truck to the weight of the coal is 7:5.
Vera_Pavlovna [14]

Answer:

Step-by-step explanation:

total weight is 4 tons.

ratio of weight of truck to weight of coal is 7:5....added = 12

so 7/12 of the total weight is the truck's

and 5/12 of the total weight is the coal

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8 0
3 years ago
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vesna_86 [32]

Answer:

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Step-by-step explanation:

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3 0
3 years ago
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C.
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