If the angles of a triangle are in the ratio of 2 : 3 : 4, then find the greatest angle of the triangle.
9x2 - 9x-4
If yx=13 and x+ x 2y = 10, then find the value of x.
যদি x +x4= 4 হয় তবে xx2+x-2 এর মান কত?