4 2 7x 3 July 8, 2019 16 32 64 128 4 2 3x )=- 7x 10 4 7x 2 )- 3 5 4x 4 7x 2 3x 2x 4 7x 2 3 X 4 7x 2 30 0 4 3x 7x 2 3 x 7x 4 2 3x 6 7x 4 2 3x )=- 27 4 7x 2 4 5x 3 7x 2 4 3x 1 X 2 7x 4 3x 6 3x 2 7x 4 0 quadratic formula X 2 4 )( 7x 3 )= 0 4 7x 2 3 =- 1 5 2 4 7x )- 3 8x 1