1.Tentukan HP Dari a) | 4 X – 5 | = 11 b) | X – 3 | = | 2 X + 5 | Please Help Me

By Admin ReiPosted on December 6, 2022

1.Tentukan HP Dari
a) | 4 X – 5 | = 11
b) | X – 3 | = | 2 X + 5 |
Please Help Me

Jawaban Terkonfirmasi

A)
|4x – 5| = 11

4x – 5 = 11
4x = 16
x = 4
atau
4x – 5 = -11
4x = -6
x = $- frac{3}{2}$

b)
|x – 3| = |2x + 5|
(|x – 3|)² = (|2x + 5|)²
x² – 6x + 9 = 4x² + 20x + 25
3x² + 26x +16 = 0
(3x + 2)(x + 8)
x = – $frac{2}{3}$ atau x = -8