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Dmitriy789 [7]
1 year ago
13

x-formula">\sqrt{x}4-\sqrt{x}\sqrt{x}7 -\sqrt{x}\sqrt{x}4+\sqrt{x}7 +\sqrt{x}2
Mathematics
1 answer:
LiRa [457]1 year ago
5 0

4x - 7x - 4x + 7 \sqrt{x}  +  \sqrt{x}

- 7x + 8 \sqrt{x}

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Solve -2x^2 + 10x + 9 =0 by using completing the squares and give u r answer to two decimal places
adell [148]
<span>-2x^2 + 10x + 9 =0
multiply whole equation by -1
2x^2  -10x -9 =0

(sqrt2x)^2  -2(sqrt2x)(5/</span>sqrt2) -9=0
add (5/sqrt2)^2 on both sides
(sqrt2x)^2  -2(sqrt2x)(5/sqrt2) + (5/sqrt2)^2-9=(5/sqrt2)^2

a^2-2ab+b^2=(a-b)^2
(sqrt2x  -  5/sqrt2)^2=(5/sqrt2)^2+9

(sqrt2x  -  5/sqrt2)^2=21.5

taking squareroot on both sides

sqrt2x  -  5/sqrt2 = +-4.64
so
sqrt2x  -  5/sqrt2 = +4.64       or         sqrt2x  -  5/sqrt2 = -4.64
sqrt2x = 4.64 +  5/sqrt2                     sqrt2x = -4.64 +  5/sqrt2
sqrt2x =8.18                                         sqrt2x = -1.1045
x=8.18/sqrt2                                        x= -1.1045/sqrt2
x=5.78                                                 x=-0.781
3 0
3 years ago
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Some one please click on my profile and answer my two questions they are about circles than you
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7 0
2 years ago
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What is 9.34 kl = to dal
charle [14.2K]
One kiloliter is equal to one hundred dekaliters. Multiply 9.43*100 to get your answer :)
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zloy xaker [14]

The answer is D

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8 0
2 years ago
I. AM .SO. CONFUSED. HELP. PLZ.
dedylja [7]

Answer:

16mm

Step-by-step explanation:

Just do 40 * 2/5 = 80/5 = 16mm

3 0
3 years ago
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