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Verified answer
Mapel : MatematikaBab : Aljabar
9x² - 5x + 9 + 20 + 4x² - 7x
= 9x² + 4x² - 5x - 7x + 9 + 20
= 13x² - 12x + 29
Verified answer
Bab AljabarSekolah Menengah Pertama Kelas VIII
9x^2 - 5x + 9 + 20 + 4x^2 - 7x
= 9x^2 + 4x^2 - 5x - 7x + 9 + 20
= 13x^2 - (-2x) + 29