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sdas [7]
3 years ago
9

Solve by taking the square root of both sides. 3(x+4)^2-24=0

Mathematics
2 answers:
VARVARA [1.3K]3 years ago
6 0
<span>3(x+4)^2-24=0
</span>
<span>3(x+4)^2 = 24
</span>
<span>(x+4)^2 =  24/3
</span>
<span>(x+4)^2 = 8
</span><span>
</span><span>(x+4)² = (2√2)² ⇒ x+4 = 2√2 ⇒ x = 2√2 - 4
</span>


Anna71 [15]3 years ago
6 0
3(x+4)^2-24=0 \\&#10;3(x+4)^2=24\\&#10;(x+4)^2=8\\&#10;x+4=\sqrt8 \vee x+4=-\sqrt8\\&#10;x=-4+\sqrt8 \vee x=-4-\sqrt8\\&#10;x=-4+2\sqrt2 \vee x=-4-2\sqrt2
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I need help on #15<br> I do not know how to begin this problem.
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2x^2 - x = 2(3)^2 - 3 = 2(9) - 3 = 18 - 3 = 15

So the result for the left-hand limit is 15.

----------------------------------------------------------

The right hand limit will have us start on the other side of x = 3. We start at x = 3.5 and move closer to x = 3. So we'll use the x \ge 3 portion.

Plug x = 3 into the second piece to get
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The result of the right-hand limit was 0

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3 years ago
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antiseptic1488 [7]
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Answer:

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Step-by-step explanation:

Let interest rate of $14000 be x%

and Interest rate for $7000 be y %

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multiply by 100

14000x-7000y = 59500

/700

20x-10y=85.................(1)

II condition

x%=y%+0.5%

x=y+0.5

x-y=0.5..................................(2)

solve (1) & (2)

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Eliminate y

multiply (1)by 1

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Add the two equations

10.00 x = 80.00

/ 10.00

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plug value of x in (1)

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y= 7.50 Interest rate on $7000

7 0
4 years ago
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