Question

a) x 3 = 27

 b) (2x – 1)^3 = 8

 c) (x – 2) 2 = 16

Answer 1

\(\text{x. 3 = 27}\)

\(\Rightarrow x=9\)

\(b,\Rightarrow2x-1=2\)

\(\Rightarrow2x=3\)

\(\Rightarrow x=\dfrac{3}{2}\)

\(c.\Rightarrow x-2=4\)

\(\Rightarrow x=6\)

 

Answer 2

a) x3=27

x=27:3

x=9

b)(2x-1)³=8

(2x-1)³=2³

=>2x-1=2

2x=2+1

2x=3

x=3:2

x=\(\dfrac{3}{2}\)

c)(x-2)2=16

(x-2)=16:2

x-2=8

x=8+2

x=10