D=9

Kindly answer in a good format need it ASAP

Last Digit of Student ID: 9

4) Solve the equations (don't forget to exclude non-admissible solutions when starting): a. V2x + D - Vx -4 = 1, where D is the last digit of your student ID. (10 points) 5) Find the values of k, so that the complex number z, Z = (k + 3i)(2 - i) to be a. Pure Real, and (10 points) b. Pure Imaginary. (10 points) Common Formulas . (at b)2 = a2 + 2ab + 2 a2 - b2 = (a + b)(a-b) x3 ty3 = (x ty)(x2 + xy + yz) ( x + a) (x+ b) = x2+(a+ b)x+ ab i = V-1