Matematika Assalamu'alaikum, Kakak mohon dibantu no 1, 3 dan 5 ​

terrancenicolasulv – March 08, 2023

Assalamu'alaikum, Kakak mohon dibantu no 1, 3 dan 5 ​

1. a) P(x) + Q(x) = (x² - 2x - 1) + (3x² - 5)

= x² - 2x - 1 + 3x² - 5

= x² + 3x² - 2x - 1 - 5

= 4x² - 2x - 6

b) P(x) - Q(x) = (x² - 2x - 1) - (3x² - 5)

= x² - 2x - 1 - 3x² + 5

= x² - 3x² - 2x - 1 + 5

= -2x² - 2x + 4

3. P(x) = x³ - 2x² + 3x + 4

a) P(2) = 2³ - 2.2² + 3.2 + 4

= 8 - 2.4 + 6 + 4

= 8 - 8 + 6 + 4

= 10

b) P(5) = 5³ - 2.5² + 3.5 + 4

= 125 - 2.25 + 15 + 4

= 125 - 50 + 15 + 4

= 94

c) P(-2) = (-2)³ - 2(-2)² + 3(-2) + 4

= (-8) - 2.4 + (-6) + 4

= -8 - 8 - 6 + 4

= -18

5. hasil = x⁴ - 3x² + 13x - 21

sisa = 24

(cara ada di foto)

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