Question

(x-5) mũ 2 = 16

(2x-1) mũ 3 = -64

2 mũ x + 2 mũ x+3 = 144

2 mũ x-1 + 5×2 mũ x-2= 224

Answer 1

(x - 5)² = 16

=> (x - 5)² = 4²

=> \(\orbr{\begin{cases}x-5=4\\x-5=-4\end{cases}}\)

=> \(\orbr{\begin{cases}x=9\\x=1\end{cases}}\)

(2x - 1)³ = -64

=> (2x - 1)³ = -4³

=> 2x - 1 = -4

=> 2x = -4 + 1

=> 2x = -3

=> x = -3/2

Answer 2

( x - 5)² = 16

=> (x - 5)² = 4²

=> \(\orbr{\begin{cases}x-5=4\\x-5=-4\end{cases}}\)

=> \(\orbr{\begin{cases}x=9\\x=1\end{cases}}\)