a) Evaluate the given equation √3x2-7x-30-√2x² - 7x-5=x-5. (2 Marks) b) Verify that the product of all the three cube roots of unity is unity. (1 Marks) (Hint :³ = 1).

c) A number consists of two digits whose product is 8. If the digits are interchanged, the resulting number will exceed the original one by 18. Find the number. (1 Marks)