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2 years ago

Help i don’t get it

Mathematics

1 answer:

Sliva [168]2 years ago

3 0

Answer:

2.2+3(3.4)

=2.2+10.2

=12.4

Step-by-step explanation:

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Let a = x2 + 4. Use a to find the solutions for the following equation:

Zepler [3.9K]

The solutions for x are -2, 0, 2

Solution:

Given that,

$\text { Let } a = x^2 + 4$

Given equation is:

$(x^2 + 4)^2 + 32 = 12x^2 + 48$

$(x^2 + 4)^2 + 32 = 12(x^2 + 4)$

$\text { Subtsitute } a = x^2 + 4 \text{ in above equation }$

$a^2 + 32 = 12a\\\\a^2 -12a + 32 = 0$

$\text{ Let us factorize the above equation }\\\\\text{ Splitting the middle term -12a as -4a - 8a we get, }$

$a^2 -4a - 8a + 32 = 0$

Taking "a" as common term from first two terms and taking "-8" as common from last two terms

$a(a-4)-8(a - 4) = 0$

$\text{Taking (a - 4) as common term, }\\\\(a - 4)(a - 8) = 0$

$\text{Equating to zero we get, }\\\\(a - 4) = 0 \text{ or } (a - 8) = 0\\\\a = 4 \text{ or } a = 8$

$\text{Now substitute the value of a = 8 and a = 4 in: }\\\\a = x^2 + 4$

$\text{ For a = 8: }\\\\a = x^2 + 4\\\\8 = x^2 + 4\\\\x^2 = 4\\\\x = \pm2\\\\x = +2 \text{ or } -2$

$\text{For a = 4: }\\\\a = x^2 + 4\\\\4 = x^2 + 4\\\\x = 0$

$\text{Thus solutions of } x \text{ are: }\\\\x = 0 \text{ or } x = 2 \text{ or } x = -2$

8 0

3 years ago

How many lines can be drawn through points J and K?

Harrizon [31]

Answer:

show the image because we cant answer it if there's no picture or image

Step-by-step explanation:

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1 year ago

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Explain answer ! ( WILL GIVE BRAINLST)

zheka24 [161]

Answer:

1/4,3,Pi

Step-by-step explanation:

Pi is infinet

the other number is 1.4

and 1/4 is the lowest

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3 years ago

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There are 70 balls in a box: 20 red, 20 blue, 20 yellow, and 10 that are either black or white. What is the least number of ball

igor_vitrenko [27]

Answer:

Step-by-step explanation:

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2 years ago

Which equation is equivalent to 3x – 4y = 8?

lawyer [7]

The answer is D) Y = 3/4x-2

3x - 4y = 8
Express it in the term of y.

Subtract 3x from both sides:
3x - 4y - 3x = 8 - 3x
- 4y = 8 - 3x

Divide both sides by -4
-4y/-4 = (8 - 3x)-4
y = 8/-4 - 3x/-4
y = -2 - (-3/4x)
y = -2 + 3/4x
y = 3/4x - 2

4 0

3 years ago