kak tolong yang nomer 1 2 dan 3 kak

1. x = -2
|4 - 2x - 3x²|
= |4 -2(-2) - 3(-2)²|
= |4 + 4 - 3(4)|
= |8 - 12|
= |-4|
= 4 (a)

2. |5 - x| = 7
5 - x = 7
x = 5 - 7
x = -2
atau
-(5 - x) = 7
-5 + x = 7
x = 12

3.
|6 - x| = |2x + 3|
(6 - x)² = (2x + 3)²
(6 - x)² - (2x + 3)² = 0
((6 - x) + (2x + 3))((6 - x) - (2x + 3)) = 0
(x + 9)(-3x + 3) = 0
x = -9 atau x = 1