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arsen [322]
3 years ago
13

Find the sum of 2x 2 + 3x - 4, 8 - 3x, and -5x 2 + 2.

Mathematics
1 answer:
Greeley [361]3 years ago
6 0
The answer is:  " -3x² + 6 " .
_________________________________________________
Explanation:
_________________________________________________
 (2x² + 3x - 4) + (8 - 3x) + (- 5x² + 2) =

 2x² + 3x - 4 + 8 - 3x + 1(- 5x² + 2) ;
_____________________________

Note:  1(-5x² + 2) = - 5x² + 2 ;
______________________________
 2x² + 3x - 4 + 8 - 3x + 1(- 5x² + 2)  =

 2x² + 3x - 4 + 8 - 3x - 5x² + 2  = ?
_____________________________
Combine the "like terms" ;

+2x² - 5x² = - 3x² ;

+3x -3x = 0

-4 + 8 + 2 = 6 ;
___________________________________________________
So, we have:  " - 3x² + 6 " .
___________________________________________________

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Step-by-step explanation:

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If the volume of each brick will be 64 cubic centimeters. Then the mass of each brick will be 192 grams.

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brainly.com/question/952755

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