Question

Tolong bantu ya kak..

Answer 1

A) (5x.2) - (3x.4) = -6
       10x - 12x = -6
           -2x = -6
              x = 2

b) (x^2.1.-5) + (x.1.0) + (2.2.0) - (0.1.2) - (0.1.x^2) - (-5.2.x) = 10
      -5x^2 + 0 + 0 - 0 - 0 + 10x = 10
      -5x^2 + 10x - 10 = 0
        x^2 - 2x + 2 = 0
        x^2 - 2x + 1 = -2 + 1
        (x-1)^2 = -1
        x-1 = V(-1) 
         x = V(-1) + 1  

c) (x-2)(x) - (-5)(3) = 0
      x^2 - 2x + 15 = 0
     (x-5)(x+3) = 0
      x = 5 atau x = -3