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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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no they are different

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but in second expressions cube of three is written as x to the power.

so they are not equal

3 0
3 years ago
The width of a rectangle is 4 1/6 feet, and its area is 35 square feet. What is the perimeter of this rectangle?
DanielleElmas [232]

Answer:

perimeter = 25.13feets

Step-by-step explanation:

width = 25/6 feet

Area = 35 square feet

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perimeter of the rectangle = 2(25/6 + 8.4) = 25.13 feets

5 0
3 years ago
Find the GCF of 6,36
Ksju [112]

Answer:

Okay, so the answer would be 6. please let this be the brainliest.

Step-by-step explanation:

Find the prime factorization of 36

36=2x2x3x3

gcf-2x3

7 0
3 years ago
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marissa [1.9K]

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Step-by-step explanation:

7 0
3 years ago
Evaluate the expression 3.14(a^2 + ab) when a = 3 and b = 4
otez555 [7]

Answer:

ASK YOUR QUESTION

Middle School  Mathematics  5+3 pts

Evaluate the expression 3.14(a2 + ab) when a = 3 and b = 4. (Input decimals only, such as 12.71, as the answer.)

Report 13.07.2017

Answer

3.14(a^2 + ab) when a = 3 and b = 4

then

3.14(3^2 + 3*4)

= 3.14(9+12)

= 3.14(21)

= 65.94

15

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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