Step-by-step explanation:
We need to write the function that have two real number zeros by calculating the discriminant i.e.
.
We know that,
If D>0 the roots are real and unequal
If D= 0 roots are real and equal
If D< 0 roots are imaginary or not real and unequal
Function (1)

D>0 the roots are real and unequal
Function (2)

D<0 the roots are real and unequal
Function (3)

D>0 the roots are real and unequal
Function (4)

D>0 the roots are real and unequal
Function (5)

D<0 the roots are real and unequal
Function (6)

D>0 the roots are real and unequal
(1),(3),(4) and (6) have two real number zeroes.
Answer:
AD = 10
Step-by-step explanation:
Answer:
Total surface area = 73.56506
Step-by-step explanation:
I do not know what shape you are trying to find the total surface area for, but I hope this is correct & helpful.
Answer:
u = 150
Step-by-step explanation:
Number of vertices:
10
Find the sum of the interior angles:
180(n - 2)
180(10 - 2)
180(8)
1440
To find u:
u = 1440 - (130 + 145 + 160 + 150 + 130 + 150 + 125 + 155 + 145)
u = 1440 - (1290)
u = 150