Question

Di ketahui persamaan tentukan :


dan

Answer 1

 2x² + 9x - 5 = 0
a = 2; b = 9 ; c = -5
a) x1 + x2 = -b/a = -9/2
x1 × x2 = c/a = -5/2
b) x1² + x2² = (x1 + x2)² - 2x1×x2
               =( -9/2 )² - 2(-5/2)
               = 81/4 + 5
              =
c)  
=
semoga membantu :)