X^2-4x+4=9 solve the equation using square roots
1 answer:
Answer: X=5 or X=-1
Step-by-step explanation:
Use the method complete the square.
1. Subtract 4 from both sides.
X^2-4x+4-4=9-4
Find what value added to both sides of the equation will make the equation on the left a perfect square trinomial.
(B/2)^2
-4/2=-2 (-2)^2 = 4
2.Add 4 to both sides.
X^2-4x + 4= 5+4
3.Factor
(x-2)^2=9
Solve for X
x-2= +or- 3
x=5 or x=-1
You might be interested in
100 = 300/3
10 = 30/3
9 = 27 /3
358 - 357
= 1
= 119 1/3
Answer:
E
Step-by-step explanation:
using the rule of radicals
×
⇔
, hence
=
=
×
×
[
= i]
= 2i
→ E
Answer:
I think it's 500
Step-by-step explanation:
Since each decagon is 10 Units of perimeter each 50 Decagons (50*10) is 500
The answer to the first one is 9/4
The answer to the second one is 20/9
Hope this is right