SOLUTION: solve the following quadratic equations using the completing the squares.
A.) x2 + 6x - 12 = 0
B.) x2 + 2x = 24
Algebra.Com
Question 956891: solve the following quadratic equations using the completing the squares.
A.) x2 + 6x - 12 = 0
B.) x2 + 2x = 24
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
solve the following quadratic equations using the completing the squares.
A.) x2 + 6x - 12 = 0
(x^2+6x+9)-9-12=0
(x+3)^2-21=0
(x+3)^2=21
take sqrt of both sides
x+3=±√21
x=-3+√21
or
x=-3-√21
..
B.) x2 + 2x = 24
(x^2+2x+1)=24+1
(x+1)^2=25
take sqrt of both sides
x+1=±√25
x=-1±5
x=-6
or
x=4
RELATED QUESTIONS
Solve each of the following quadratic equations by completing the square.
x2 - 6x - 3 =... (answered by jim_thompson5910)
Solve x2 - 2x - 24 = 0 by using completing the... (answered by Boreal)
1. Which of the following is a quadratic equation that has roots of 2 1/2 and 2/3?
A)... (answered by Alan3354)
1) Using the quadratic equation x2 - 4x - 5 = 0, perform the following tasks:
a) Solve (answered by mukhopadhyay)
Using the quadratic equation x2 - 4x - 5 = 0, perform the following tasks:
a) Solve by... (answered by fractalier)
1) Using the quadratic equation x2 - 4x - 5 = 0, perform the following tasks:
a) Solve (answered by josmiceli)
πx2+2x+1=0
solve using the quadratic... (answered by Alan3354)
Solve the following quadratic equations:
1. (2x + 3)(5x – 15) = 0
2. x2 – 8 =0
3. x2 + (answered by josgarithmetic,ikleyn)
Solve by completing the square:
x2 + 6x + 4 = 0
(answered by jake_6233)