Question

4. Prove:
+
(i) (x - y - 2)2 – (x2 + y2 + z2) = 2(yz - zx - xy)
(ii) (3p - 5q)2 - (3p + 5)2 + 60pq = 0
(iii) (5a - 2)(5a - 8) = 25(a - 1)2 - 9.​

Answer 1

374*493^×272+365+478*583^÷4747