Respuesta :

sqdancefan

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Answer:

  (b) 3x^2 +6x+4

Step-by-step explanation:

  (6x+7+x^2)+(2x^2-3)

  = (1 +2)x^2 +(6)x +(7 -3) . . . . combine like terms

  = 3x^2 +6x +4

Answer:

3x ² + 6x + 4

Step-by-step explanation:

( 6x + 7 + x² ) + ( 2x² -3 )

  • Remove unnecessary parantheses

6x + 7 + x² + ( 2 x² - 3 )

6 x + 7 + x² + 2x ² - 3

  • subtract the numbers

6 x + 7 - 4 + x² + 2x²

  • collect like terms

6x + 4 + 3x²

  • use the commutative property to reorder the terms

3x ² + 6x + 4