Answer:
x = 1± 3i
Step-by-step explanation:
x^2-2x+10=0
We can complete the square to solve by subtracting 10 from each side
x^2-2x+10-10=-10
x^2 -2x = -10
We need to add (2/2) ^2 to each side or 1
x^2 -2x+1 = -10 +1
x^2 -2x+1 = -9
The left side factors into (x- (2/2) ) ^2
(x-1) ^2 = -9
Take the square root of each side
sqrt((x-1) ^2 =± sqrt(-9)
x-1 = ±sqrt(-1) sqrt(3)
Remember the sqrt(-1) = i
x-1 = ± 3i
Add 1 to each side
x-1+1 = 1± 3i
x = 1± 3i
Im not sure if this is right but:
1. b
2. c
3. b
4. a
5. c
810/2= 405
810/3= 270
810/4= 202.5 (not this one)
810/5= 162
810/6= 135
810/7= 115.71 ( not this one)
810/8= 101.25 (not this one)
810/9= 90
810/10= 81
810/11= 73.63 (not this one)
I hope this helps you!
Answer:
42.54 inches
Step-by-step explanation:
