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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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A water tank holds 12 gallons. How many full buckets of water will it take to fill the tank, if each bucket has capacity 3 quart
liraira [26]

Answer:

4 full buckets

Step-by-step explanation:

there are 4 quarts in a gallon, but it only holds 3. 12 divided by 3 is 4.

Hope it helped!

4 0
1 year ago
Read 2 more answers
I honestly don’t understand this at all can you help?
blondinia [14]
A. the first box is 7 
    the second box is 2
    the third box is 100 
    the fourth box is 6.5
    RULE: times 3 + 2
b. the first box is 45/2
    the second box is -0.75
    the third box is 0
    the fourth box is 2.75 
    RULE: times 5/2
c. the first box is 1 1/2
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6 0
3 years ago
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What is the LMC for 2x^2 - 8x + 8 and 3x^2 + 27x -30?
Vsevolod [243]

Answer:

2

Step-by-step explanation:

1st step: solve the exponential number

2x^2=4x

3x^2=9x

2nd step: rewrite the number sentence with the exponent solved

4x-8x+8                                  9x+27x-30

3rd step : solve  

 4x-8x=-4x                               9x+27x=36x

-4x+8=                                            36x-30=

    4                                                   6                  

                                                                                                   

Step 4: See what least common multiples they have in common

4 LCM =2 * 2= 4                          6 LCM= 2*3=6


So the LCM is 2

4 0
3 years ago
Hi what is the answer for a+5d+3x
sattari [20]
Well I tried doing it but depends what your trying to do with the equation but I got
x= -a/3 - 5d/3
3 0
3 years ago
I NEED HELP FAST WHAT IS 80 + -9 - 5 + 89-66+44-9+87-100+213
kow [346]

Answer:

324 is ya answer!

5 0
3 years ago
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