X 2 x 3 90 July 8, 2019 16 32 64 128 X 2x x 3 90 F x )= x 3 3x 2 72x 90 90x x 2 x 3 X x 1 x 2 x 3 90 X 3 x 2 90x 0 2 x square 3 x minus 90 2 x square 3 x minus 90 is equal to zero 90 (- 3 x 2 x 10 2 x square 3 x minus 90 factorise Factor x 3 x 2 90x 3 x 4 3 x 2 90