I would suggest factoring using the grouping method. The answer I got was (2n-1)(n+2)
20 Answer: a₁ = 4
<u>Step-by-step explanation:</u>

21 Answer: n = 13
<u>Step-by-step explanation:</u>

22 Answer: n = 5
<u>Step-by-step explanation:</u>

Solve the literal equation 2xy - xz = 4 for x
x = 4/(2y-z)
y =/ z/2
Answer: ( X- k )(3x2 - 4x + 7) + 1
Step-by-step explanation: Please find the attached files for the solution
Answer:
x lessthen or equel to 3/2
Step-by-step explanation: