Question

1. 4- x2 = 0 ?

2. x2 - x + 3 = 0 ??

Answer 1

1. 4 - x² = 0
(2 + x)(2 - x) = 0
x = - 2 atau x = 2

2. x² - x + 3 = 0
mencari akarnya menggunakan rumus abc
x₁,₂ = (- b +- √b² - 4ac)/2a
      = (1 +- √(1 - 12)/2