Matematika

Pertanyaan

tentukan hasil bagi

1. 16x^4:2x³

2. (6x²+19x+15):(3x+5)

3. 8x + 3
---- ----
3x 2x

4. 2a 2x-6
----- x --------
3x 12a

1 Jawaban

  • 1) 16x⁴
    ------------
    2x³

    = 8x

    2) 6x² + 19x + 15
    --------------------------
    3x + 5

    = (3x + 5)(2x + 3)
    --------------------------
    ( 3x + 5 )

    = 2x + 3

    3) (8x / 3x) + (3 / 2x)
    = (8x • 2x)+(3 • 3x)
    ----------------------------
    ( 3x • 2x)

    = 16x² + 9x²
    ------------------
    6x²

    = 25x²
    -----------
    6x²

    = 25/6
    = 4 ¹/6

    4) (2a / 3x) • (2x - 6 )/ 12a
    = 2a • (2x - 6)
    ---------------------
    3x • 12a

    = 2x - 6
    -------------
    18x

    = 2(x - 3)
    ---------------
    2(9x)

    = x - 3
    ----------
    9x

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