Penjelasan dengan langkah-langkah:
a.10x(2y-10)
=20y -100
b.(x+5) ×(5x-1)
=5x^2 - X + 25x -5
=5x^2 +24x -5
C.(7-2x) ×(2x -7)
=14x -49 -4x^2 +14x
=-4x^2 +28x -49
2. r=10 (caranya bisa dilihat di lampiran)
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Penjelasan dengan langkah-langkah:
a.10x(2y-10)
=20y -100
b.(x+5) ×(5x-1)
=5x^2 - X + 25x -5
=5x^2 +24x -5
C.(7-2x) ×(2x -7)
=14x -49 -4x^2 +14x
=-4x^2 +28x -49
2. r=10 (caranya bisa dilihat di lampiran)