Solve for w:aw−b=cw+d
Factorize (a2−b2)(c2−d2)−4abcd
Factorise 2(ab+cd)−a2−b2+c2+d2
Let ABCD be a quadrilateral with diagonals AC and BD. Prove the following statements (Compare these with the previous problem);
(a) AB + BC + CD > AD;
(b) AB + BC + CD + DA > 2AC;
(c) AB + BC + CD + DA > 2BD;
(d) AB + BC + CD + DA > AC + BD.