Given quadratic equation : 
Let us apply standard quadratic form 
We know, quadratic formula

a = 4
b = 2
c= -1
Now we plug in all the values in quadratic formula
.
<h3>The above one is the substitution of values of a,b,c in quadratic formula.</h3>
Answer:
60°
Step-by-step explanation:
Sum of angles of triangle = 180°
x + 40 + 80 = 180
x + 120 = 180 {Subtract 80 from both sides}
x = 180 - 120
x = 60°
Sorry for what happened but the equation is a bit hard so
I think the answer is y=-2x+6
Answer:
56.55
Step-by-step explanation:
C=2πr=2·π·9≈56.54867
Answer:
4 is a factor
Step-by-step explanation:
4x+8
4x = 4*x
8 = 4*2
4(x+2)
4 is a factor