Matematika

Pertanyaan

tolong pakai jalannya ya

kerjakan lah soal aljabar perkalian dibawah ini

1. ( x+2) (x+2) =

2.(2x+y) (3x-6) =

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

4.(2x-3) (2x-3) =

5.(7x-3) (3x-4) =

1 Jawaban

  • 1. (x+2) (x+2)
    = (x . x) + (x . 2) + (2 . x) + (2 . 2)
    = x
    ² + 2x + 2x + 4
    = x² + 4x + 4


    2.(2x+y) (3x-6)
    = (2x . 3x) + (2x . (-6)) + (y . 3x) + (y . (-6))
    = 6x
    ² + (-12x) + 3xy + (-6y)
    = 6x² - 12x + 3xy - 6y
    = 6x(x - 6) + 3y(x - 6)

    3.(x+5) (x-5)
    = (x . x) + (x . (-5)) + (5 . x) + (5 . (-5))
    = x
    ² - 5x + 5x - 25
    = x² - 25

    4.(2x-3) (2x-3)
    = (2x . 2x) + (2x . (-3)) - (3 . 2x) - (3 . (-3))
    = 4x
    ² - 6x - 6x + 9
    = 4x² - 12x + 9

    5.(7x-3) (3x-4)
    = 21x
    ² - 28x - 9x + 12
    = 21x² - 37x + 12

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