Question

tolong di kerjakan di kertas, reward nya 75 poin

Answer 1

Jawab:

Penjelasan dengan langkah-langkah:

1)

(x + 5)(x + 4) = 0

x = -5 atau x = -4

2)

a = 2

b = 30

c = 112

-30 +- akar(900 - 4(2)(112) / 4

-30 +- akar(4) / 4

-30 +- 2 / 4

-30 + 2 / 4 = -28 / 4 = -7

-30 - 2 / 4 = -32 / 4 = -8

3)

D = b^2 - 4ac

D = 1 - 4(8)(26)

D = -831

4)

D = b^2 - 4ac

D = 36 - 4(7)(9)

D = 36 - 252

D = -216

D < 0, akar-akarnya tidak real

5)

(x - 10)(x - 10) = 0

x = 10