X 2 4x 7 21 July 8, 2019 16 32 64 128 X 7 )( x 5 )= 2 4x 21 Simplify x 7 x 2 4x 21 Daca 21 x 2 4x 7 4 Divide x 2 4x 21 x 7 X 7 14x 21y )- x 2 4x 6y Dacă 21 x 2 4x 7 4 atunci 2x 7 (x ^ 2 - 4x)/(x - 7) = 21/(x - 7)