Question

Tentukan hasil jumlah dan hasil kali akar akar persamaan kuadrat berikut ini.
a. x²- 4x + 4 = 0
b. x² + 4x + 3 = 0
c. x² - 6x + 5 = 0
d. 2x² - 2x = 0
e. x² - 4 = 0
f. 2x² - 3x + 4 = 0

Answer 1

Jawab:

a. x1 + x2 = 4, x1.x2 = 4

b. x1 + x2 = -4, x1.x2 = 3

c. x1 + x2 = 6, x1.x2 = 5

d. x1 + x2 = 1, x1.x2 = 0

e. x1 + x2 = 0, x1.x2 = -4

f. x1 + x2 = 3/2, x1.x2 = 2

Penjelasan dengan langkah-langkah:

x1 + x2 = -b/a dan x1.x2 = c/a

a. x1 + x2 = 4, x1.x2 = 4

b. x1 + x2 = -4, x1.x2 = 3

c. x1 + x2 = 6, x1.x2 = 5

d. x1 + x2 = 1, x1.x2 = 0

e. x1 + x2 = 0, x1.x2 = -4

f. x1 + x2 = 3/2, x1.x2 = 2