What is the sum of the polynomials? (6x+7+x2)+(2×2-3) -x^2 +6x+4, 3x^2 +6x+4, 9x+4, 9x^2 +4

Question

What is the sum of the polynomials?
(6x+7+x2)+(2×2-3)

-x^2 +6x+4, 3x^2 +6x+4, 9x+4, 9x^2 +4

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Cherry 4 years 2021-09-02T00:43:46+00:00 2 Answers 7 views 0

Answers ( )

  1. thuthao
    0
    2021-09-02T00:45:01+00:00
    Reply

    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

  2. huyenthanh
    0
    2021-09-02T00:45:19+00:00
    Reply

    9514 1404 393

    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

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )