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MA_775_DIABLO [31]
3 years ago
6

Solve 4x4 + 7x2 – 2 = 0. Choose the factored form of the polynomial expression.

Mathematics
2 answers:
s344n2d4d5 [400]3 years ago
8 0

Answer:

1st question result is: (4x^2-1)(x^2+2)

2nd question result is: -1/2, 1/2, -i sqrt 2, i sqrt 2

Step-by-step explanation:


rjkz [21]3 years ago
4 0

4x^4 +7x^2 -2=0\\16x^4 +7(4)x^2 -8\\(4x^2 +8)(4x^2-1)=0\\(x^2+2)(4x^2-1)=0\\x^2 + 2 =0 \vee 4x^2-1 = 0


x^2+2 = 0

Only has solutions in the complex numbers.

x= \sqrt{-2} \\x = \pm i \sqrt{2}

And

4x^2-1 = 0\\x^2 = \frac{1}{4}\\x = \pm \frac{1}{2}

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Plz help I need to know how many bags of snacks they bought in all
spin [16.1K]

Answer:

7x - 2

Step-by-step explanation:

let x be the number of bags of chips, then

3x is the number of bags of pretzels ← 3 times the number of bags of chips

3x - 2 is the number of bags of nachos ← 2 less than bags of pretzels

total snacks bought = x + 3x + 3x - 2 = 7x - 2



6 0
3 years ago
Help!!!! me please the first to answer will get brainliest!!!! please help me<br><br><br>​
never [62]
<h3>1 Answer: v = -130</h3>

=============================================================

Explanation:

Because we're given multiple choices to pick from, we can go through each to do trial and error.

For instance, if v = 52, then

v/13 < -7

52/13 < -7

4 < -7

but that's a false statement since 4 is not smaller than -7. Use a number line to see this. You should have -7 to the left of 4, showing that -7 is the smaller value.

Because 4 < -7 is false, this means v/13 < -7 is false when v = 52. This rules out v = 52. You should find that v = 26 and v = -39 won't work for similar reasons.

Only v = -130 works since...

v/13 < -7

-130/13 < -7

-10 < -7

This is true because -10 is to the left of -7 on the number line.

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

Another approach:

We have some unknown number v, and we're dividing by 13 to get the expression v/13. To undo this, we multiply both sides by 13

v/13 < -7

13*(v/13) < 13*(-7) .... multiply both sides by 13

v < -91

So any solution to the original inequality must be smaller than -91. This allows us to rule out v = 52, v = 26 and v = -39.

The value v = -130 is smaller than -91, so it satisfies v < -91. Therefore, v = -130 is a solution to the original inequality.

6 0
3 years ago
X2 - 49 = 0 solve for x
Bogdan [553]

x^2 - 49 = 0

Add 49 to both sides:

x^2 = 49

Take the square root of both sides:

X = 7

8 0
3 years ago
What is the y-intercept of the following equation?<br> x + 2y = 8<br> a 8<br> b 4<br> C 6<br> d 2
nadya68 [22]
X+2y=8
2y=8/2y
=4 is the answer. You’re so welcome
7 0
3 years ago
If x^2=20 what is the value of x
tankabanditka [31]

Answer:

Step-by-step explanation:

x^2=20

just square both sides and u get

x = 4.472135955

6 0
3 years ago
Read 2 more answers
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