Answer:
Step-by-step explanation:
To re-write the function by completing the square, the procedure is to first
(i)take the coefficient of x
(ii)Divide it by 2 and Square it
Coefficient of x=1
Divided by 2 = 1/2
Square of 1/2 =
Next, we add it to the function and subtract same so that the equation remains balanced
Pick each of the squared term and square the sum
42
89-5=84
84÷2=42
and reverse it to check
(42+5)+(42)=89
18
The factors of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72
The factors of 18 are 1, 2, 3, 6, 9, 18
The common factors are 1, 2, 3, 6, 9, 18
The greatest common factor = 18