Latest exam Aptitude Question SOLUTION: Factor Completely please... 16x^4-81y^4 12b^2+6ab-36a^2 6x^2-30xy+24y2 9a^4+36b^4 25x^4-40x^3+16x^2 81r^4-256s^4 16(x-y)^2-9 x^4-81