4 2 5x 9 July 8, 2019 16 32 64 128 4 5x 2 9x 3 X 4 5x 2 9 4 5x 2 )- 3x 9 X 4 5x 2 9 0 4 5x 2 )= 2 9x 4 5x 2 7 9 1 8 16x 4 25x 2 9 0 5x 2 9x 4 factored 4 9 5x 2 )= 356 4 72 2 5x 2x 2 92 5x 2 9x 4 0 quadratic formula 9 4 5x )+ 2 7 6x 7 9x 2 4 5x 3 )- 8 5x 2 9 4 0 Factorise 5x 2 9x 4