Answer:

1. x=5 2. (2x + 1) ( x- 1 ) 3. (3x +15) (x+5) 4. x=3

Step-by-step explanation:

for 1 transpose the number and square both sides

for 2 use factoring method

for 3 transpose the number and factor, cube root of x³ is x and 27 is 3 .