Answer:
10
20
Step-by-step explanation:
correct c=3 x 10
incorrect i=-1
-------
incorrect= 10
number of questions= 10+10= 20
Answer:A
Step-by-step explanation:
Answer:
c=81
Step-by-step explanation:
Take half of b: 18/2=9
Square the result: 9²=81
This is your value of c that will result in a perfect square trinomial, which is c=81. If you were to keep going, you would do the following:
x²+18x+81=25+81
x²+18x+81=106
(x+9)^2=106 <-- Final simplification
(x+9