Question

Ada yg tau nomor 4 atau 5? plisss:')

Answer 1

4. 2x² + 6x - 4 = 0
x1 + x2 = -b/a = -6/2 = -3
x1 x2 = c/a = -4/2 = -2
(x1)² + (x2)² = (x1 + x2)² - 2x1x2
                 = (-3)² - 2(-2) = 9 + 4 = 13 (E)
5. x² + 3x - 6 = 0
α + β = -b/a = -3
αβ = c/a = -6
α²β+αβ² = αβ(α + β) = -6 (-3) = 18 (E)