Solving the equation
using completing square method we get 
So, Option A is correct.
Step-by-step explanation:
We need to solve the equation
using completing square method.
Solving using completing square method

For completing the square we need to make formula a^2-2ab+b^2=(a-b)^2
Divide the equations by 2


Adding and subtracting (3)^2 on both sides.



Solving the equation
using completing square method we get 
So, Option A is correct.
Keywords: Solving Quadratic Equation
Learn more about Solving Quadratic Equation at:
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1 2 3 4 6 8 10 12 15 20 24 30 40 60 and 120
Answer: correct choice is B.
Rectangle has two axes of symmetry So an arbitrary rectangle can be reflected across two axis of symmetry so that it carries onto itself.
Answer:
50%
Step-by-step explanation:
Let
be equal to the decimal when multiplied by 2 equals 1

Divide both sides by 2

Multiply the decimal by 100 to get a percent
0.5×100=50%
I hope this helps!