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3 years ago

Solve the equation without the use of a calculator. please Help!!! Thank you!!! 12x^3-30x=8-2x^2

Mathematics

1 answer:

Arisa [49]3 years ago

3 0

12x^3 +2x^2-30x = 8
2x( 6x^2 +x -15) = 8
so 2x= 8, x=4
(2x) ( 2x-3) ( 3x+5) = 8
2x-3 = 8
2x= 11
x= 5.5
3x+5=8
3x= 3
x=1

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<img src="https://tex.z-dn.net/?f=%5Ctext%7BSolve%20for%20x%3A%7D%5C%5C%5C%5C3x%20%2B%2054%20%3D%20180" id="TexFormula1" title="

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Hi there!

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I believe your answer is:

$x = 42$

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Here’s why:

We will use inverse operations to solve for 'x'.

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$\boxed{\text{Calculating the Answer....}}\\\\3x+54=180\\----------\\\rightarrow 3x + 54 - 54 = 180-54\\\\\rightarrow 3x = 126\\\\\rightarrow\frac{3x=126}{3}\\\\\rightarrow\boxed{x=42}$

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Hope this helps you. I apologize if it’s incorrect.

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