Question

Bantu jawab donk kk saya ngak ngerti soal ini...

Answer 1

21. 2x³ + 2x² + 3x² + 3x
     = 2x³ + 5x² + 3x
     = 6x² + 10x + 3 (a)
22. 6x + 12 - x³ - 2x²
     = -x³ - 2x² + 6x + 12
     = -3x² - 4x + 6 (b)

Answer 2

Pakai turunan u.v
y = u.v
y' = u'v + uv'

21) y = (2x + 3)(x² + x)
y' = (2)(x² + x) + (2x + 3)(2x + 1)
= 2x² + 2x + 4x² + 8x + 3
= 6x² + 10x + 3 (A)

22) y = (6 - x²)(x + 2)
y' = (-2x)(x + 2) + (6 - x²)(1)
= -2x² - 4x + 6 - x²
= -3x² - 4x + 6 (B)