25 points! show all work! image attached.

a) x = 13

b) x = 7

Step-by-step explanation:

A) Since they have the same base of 2 so

x + 4 + (-5) = 12

          x - 1 = 12

               x = 13

b) Since they have the same base of -3 so

8 + x + 4 = 19

   x + 12 = 19

          x = 7

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225