x^2-12x= -36
Step By Step Please.
2007-10-21 18:18:15 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
x^2-12x= -36
Add 36 to both sides
x^2-12x+36=0
Factor
(x-6)(x-6)=0
x=6
2007-10-21 18:22:01 · answer #1 · answered by cow9634 3 · 0⤊ 0⤋
x^2-12x= -36 ADD 36 to both sides
x^2-12x + 36 = 0 FACTOR
(x - 6)(x - 6) = 0 Set term = 0
x - 6 = 0
x = 6
CHECK put x = 6 in the original equation
x^2-12x= -36
6^2 - (12)(6) = 36
36 - 72 = -36
-36 = -36 checks out
2007-10-22 01:24:39 · answer #2 · answered by r r 5 · 1⤊ 0⤋
Add 36 to each side:
x^2-12x+36=0
Then foil:
(x-6)(x-6)
x=6
2007-10-22 01:23:11 · answer #3 · answered by Anonymous · 0⤊ 0⤋
x^2 - 12x = - 36
x^2 - 12x + 36 = 0
(x - 6)(x + 6) = 0
Answer: x is either 6 or - 6.
Proof (where x is 6):
6^2 - 12(6) = - 36
36 - 72 = - 36
Proof (where x is - 6):
- 6^2 - 12(- 6) = - 36
36 - 72 = - 36
2007-10-22 02:04:44 · answer #4 · answered by Jun Agruda 7 · 2⤊ 0⤋
x^2-12x=-36
x^2-12x+36=0
(x-6)(x-6)=0
x=6
2007-10-22 01:27:09 · answer #5 · answered by doctor_T 2 · 0⤊ 0⤋
x^2-12x+36=0
a=1
b=-12
c=36
(x-6)^2=0
x=6
2007-10-22 01:23:30 · answer #6 · answered by iyiogrenci 6 · 0⤊ 0⤋