Question

cần gấp: a) (19 x + 2 . 5² ) : 14 = (13 - 8)² - 4²  

               b) 2 . 3^x = 10 .3¹² + 8 . 27⁴ 

Answer 1

A)(19x+2.5²):14=(13-8)²-4²

(19x+2.5²):14=5²-4²

(19x+2.5²):14=9

19x+2.5²=9.14

19x+2.25=

Answer 2

Chưa xong đâu bạn

19x+50=126

19x=126-50

19x=76

x=76:19=4

B)2.3^x=10.3¹²+8.27⁴

2.3^x=10.3¹²+8.(3³)⁴

2.3^x=10.3¹²+8.3¹²

2.3^x=3¹².(10+8)

2.3^x=3¹².18

2.3^x=3¹².3².2

2.3^x=3¹⁴.2

3^x=3¹⁴

x=14 

Vậy x=14

Answer 3

k cho mình nhé