Question

jika p(x)= 3x²+4 dan Q(x)x-2 maka nilai p (x)​

Answer 1

Verified answer

Jawab:

x² + 2x - 3 = 0

(x + 3) (x - 1) = 0

x = -3 , x = 1

P(-3) = 7(-3) + 3

P(-3) = -21 + 3 = -18

(-3)³ + 3(-3)² - 3p + q = -18

-27 + 3(9) - 3p + q = -18

-27 + 27 - 3p + q = -18

-3p + q = -18 ...(1)

P(1) = 7 . 1 + 3 = 7 + 3 = 10

1³ + 3 . 1² + p . 1 + q = 10

1 + 3 + p + q = 10

p + q + 4 = 10

p + q = 10 - 4

p + q = 6 ...(2)

eliminasi persamaan 1 dan 2

-4p = -24

p = -24/(-4) = 6

p + q = 6

6 + q = 6

q = 6 - 6 = 0

maka nilai p dan q berturut-turut adalah 6 dan 0

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