Question

Could somebody help me solve this please?

http://gyazo.com/9a4f628d52af9926658d86a2649a855c

Answer 1

your answer is D

Answer 2

Do you know how to complete the square?

Answer 3

Thank you Sensuelle, and no I do not gryphon.

Answer 4

Example

Solve x^2 + 4x = -1 which is also x^2 +4x +1=0
Step 1 can be skipped in this example since the coefficient of x^2 is 1
Step 2 Move the number term to the right side of the equation:
x^2 + 4x = -1
Step 3 Complete the square on the left side of the equation and balance this by adding the same number to the right side of the equation.
(b/2)^2 = (4/2)^2 = 2^2 = 4
x^2 + 4x + 4 = -1 + 4
(x + 2)^2 = 3
Step 4 Take the square root on both sides of the equation:
x + 2 = ±√3 = ±1.73 (to 2 decimals)
Step 5 Subtract 2 from both sides:
x = ±1.73 – 2 = -3.73 or -0.27

Answer 5

Wow thank you so much! Going to save this as reference

Answer 6

welcome!