SOLUTION: I need help about how you do this problem step by step . Solve the equation by completing the square. x2 + 18x + 58 = 0

Question 411648: I need help about how you do this problem step by step .
Solve the equation by completing the square.
x2 + 18x + 58 = 0
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Solve the equation by completing the square.
x^2 + 18x + 58 = 0
Subtract 58 from both sides, showing the place we need to complete the square:
x^2 + 18x + ___ = -58
We find the value to complete the square by; divide the coefficient of x by 2 & square it
That would be (18/2)^2 which is 81, add 81 to both sides, we have:
x^2 + 18x + 81 = -58 + 81
x^2 + 18x + 81 = +23
factor the perfect square
(x + 9)^2 = 23
Find the square root of both sides
x + 9 = +/-
subtract 9 from both sides
x = -9 +/-
Two solutions
x = -9 +
and
x = -9 -
:
:
Was this step-by-step enough for you?

RELATED QUESTIONS
I need help on solving this step by step , i don't know how to go about this problem when (answered by emargo19)

36x^2+18x+1=0 I need help to solve by completing the... (answered by solver91311)

I need help on this problem please help: You are solving ax^2+bx+c=0(where a doesn't=0)... (answered by ankor@dixie-net.com)

using the quadratic equation x2-4x-5=0 perform the following task: solve by completing (answered by Earlsdon)

Please help me solve this quadratic equation in a step-by-step manner by completing the... (answered by nerdybill,Theo)

please help me to solve this problem by completing the sqaure step be step... (answered by ewatrrr)

I need help with this one, the 0 is confusing me. Solve by completing the square: (answered by venugopalramana)

I need help!!! My problem is I must solve this equation by completing the square!!! The... (answered by jim_thompson5910)

I need help with this problem please. A has coordinates (x1,x2) B (x2,y2) M (x1+x2/2... (answered by mananth)