Matematika

Pertanyaan

selesaikan persamaan berikut!
2a-(5a + 10) = (5- 3a) - 2(5 - a)+19

1 Jawaban

  • 2a-(5a + 10) = (5- 3a) - 2(5 - a)+19
    = 2a (-5a-10) = (5-3a ) - 10+2a +19
    = -10a^2 -10a = 5-3a -10 +2a +19
    = -10a^2 -10a = -a +14
    = -10a^2 -10a +a =14
    = -10a^2 -9a -14 = 0
    10a^2 +9a +14 =0

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