The answer is a and c
Answer:
The answer for 6 is B.
Step-by-step explanation:
In order to finish completing the square you need to half the coefficient in front of x, square it and add and subtract it in order to not change the value of the expression.
(x2 + 10x + 25) + 13 - 25
(x + 5)2 -12
133=x + (x+5) + (x+14)
133 = 3x+19
3x=114
x= 114/3 =38
5+38 =43
38+14 =52
check: 38 +43 +52 = 133
3 sides are : 38, 43 & 52
That would be 2/7
Using substitution. x^2 +x+1 at 1 is 7
sqrt4 is 2
2/7
