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vladimir1956 [14]
3 years ago
13

Let a=x^2+4. Use a to find the solutions for the following equation:

Mathematics
2 answers:
Kitty [74]3 years ago
7 0

Answer:

-2,0, 2(+)

Step-by-step explanation:

Helga [31]3 years ago
4 0
(x^2+4)^2 + 32 = 12x^2 + 48 .... a = x^2 + 4 
<span>(x^2 + 4)^2 + 32 = 12(x^2 + 4) </span>
<span>a^2 + 32 = 12a </span>
<span>a^2 - 12a + 32 = 0 </span>
<span>(a - 8)(a - 4) = 0 </span>
<span>a = 8 and a = 4 </span>

<span>for a = 8 ... 8 = x^2 + 4 ... x^2 = 4 ... x = +/- 2 </span>
<span>for a = 4 ... 4 = x^2 + 4 ... x^2 = 0 ... x = 0 </span>

<span>x = -2, 0, +2 so your answer is going to be e

</span>
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Question 17 Multiple Choice Worth 1 points) (06.02 LC) Which of these is the algebraic expression for "5 times the sum of 2 and
Setler [38]

Answer:

D 5(2 + y)​

Step-by-step explanation:

3 0
2 years ago
3. Devon's pencil box has a volume of 330 cmIf the height of the pencil box is 6 cm and the width is 5 cm, what would the length
Valentin [98]
330cm^3 = 6cm x 5cm x L
330^3 = 30cm^2 x L
L = 11cm
4 0
3 years ago
Emma decides to mix grades of gasoline in her truck. She puts in 6 gallons of regular and 14 gallons of premium for a total cost
iogann1982 [59]
The answer would be $91.96
8 0
2 years ago
Suppose $x$,$y$, and $z$ form a geometric sequence. if you know that $x+y+z=18$ and $x^2+y^2+z^2=612$, find the value of $y$.
OverLord2011 [107]
Because x,y,z form a geometric sequence,  therefore the common ratio is
r = y/x = z/y
That is,
y² = xz                            (1)

We are given:
x + y + z = 18
Therefore
x + z = 18 - y                 (2)

Also,
x² + y² + z² = 612
Therefore, from (1), obtain
x² + z² + xz = 612 
(x + z)² - xz = 612
From (1) and (2), obtain
(18 - y)² - y² = 612
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Answer: y = -8

4 0
3 years ago
15a^2 + 14a -8 use A.C method
bekas [8.4K]
Hello there!

A C method : you multiply the A and C -> find the factors of AC that can add                          up to B. (a² + bx + c)

15a² + 14a - 8

you multiply 15 and -8 = -120
Find the two factors of -120 that adds up to 14.
We could used 20 and -6.
So we can split the original equation to this:

15a² + 20a - 6a - 8
Now, we use grouping method.
Let's group 15a² + 20a  and -6a - 8.

15a² + 20a can be factored like this :
5a(3a + 4)

-6a - 8 can be factored like this :
-2(3a + 4)

So it is 5a(3a + 4) × -2(3a + 4)
We can simplify this into this :
(5a - 2)(3a + 4)


So your final answer is (5a - 2)(3a + 4).
Hope this helped! :)
8 0
2 years ago
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