Question

Bantu cari jawabannya yah

Answer 1

2).

x² - 10x + 21 < 0
( x - 7 ) ( x - 3 ) < 0

x < 7
x > 3

HP = { x | 3 < x < 7 ; x ∈ R } => (d.)

3).

3x² - 7x - 6 ≥ 0
( x - 3 ) ( 3x + 2 ) ≥ 0

x ≥ -2/3
x ≤ 3

HP = { x | -2/3 ≤ x ≤ 3 ; x ∈ R } => (a.)