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b. 5x^2 - x + 25x - 5= 5x^2- 24x -5
c. 14x-49 -4x^2+14x = -4x^2 +28x -49
B. (x + 5) x (5x - 1) = x(5x - 1 ) + 5 (5x - 1 )
5x² - 1 + 25x - 5
5x² + 24x - 5
C. (7 - 2x ) x (2x - 7 ) = 14x - 49 - 4x² + 14x
-4x² + 28x - 49
kebetulan tugas saya jga kaya ini 2 minggu kmaren. dan puji Tuhan dpt nilai 100.
psti soalnya dr buku paket hal 55 no.2