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V125BC [204]
3 years ago
14

How to solve x^2-4y^2=7

Mathematics
1 answer:
gizmo_the_mogwai [7]3 years ago
7 0
It is impossible to solve for both variables without a second equation.
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(Multiple Choice, 20 pts)
ivanzaharov [21]

Answer:

x = -3, x = 0 is a extraneous solution

Step-by-step explanation:

Step 1: Cross-multiply

3x² = 4x² + 3x

Step 2: Isolate <em>x</em>'s

0 = x² + 3x

Step 3: Factor

0 = x(x + 3)

Step 4: Find roots

x = 0, -3

Step 5: Double check work

Plug in both to see if they both work. Only x = 0 should be extraneous. We now have our answer!

3 0
3 years ago
Part 1
natali 33 [55]
Because December is really cold
5 0
3 years ago
(8x^3 - x) - (10x - 5x^2 - 3x^3) <br> Show your work.
sergeinik [125]

Let's simplify step-by-step.
8
x
3
−
x
−
(
10
x
−
5
x
2
−
3
x
3
)
Distribute the Negative Sign:
=
8
x
3
−
x
+
−
1
(
10
x
−
5
x
2
−
3
x
3
)
=
8
x
3
+
−
x
+
−
1
(
10
x
)
+
−
1
(
−
5
x
2
)
+
−
1
(
−
3
x
3
)
=
8
x
3
+
−
x
+
−
10
x
+
5
x
2
+
3
x
3
Combine Like Terms:
=
8
x
3
+
−
x
+
−
10
x
+
5
x
2
+
3
x
3
=
(
8
x
3
+
3
x
3
)
+
(
5
x
2
)
+
(
−
x
+
−
10
x
)
=
11
x
3
+
5
x
2
+
−
11
x
Answer:
=
11
x
3
+
5
x
2
−
11
x


Brainliest Please:)
6 0
3 years ago
Read 2 more answers
3x + 4 divided by 2 = 9.5
Sergeu [11.5K]
2.5 is your answer because first we divide the numbers then subtract 2 from both sides and simplify
8 0
2 years ago
Read 2 more answers
(HELP ME I CANT) Find the length of sides of ∆OTP if O is the centre of the circle ,PT is the length of
Ostrovityanka [42]

Hey there mate :)

Please check the attached image for answer.

5 0
2 years ago
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