Algebra help!! solve x^2-7x+6=0?
回答 (11)
2009-12-31 4:14 pm
✔ 最佳答案
this is a quadratic equationany equation of the form ax^2+bx+c = 0 has max of two solutions which are
[-b+sqrt(b^2-4ac)]/2a and [-b-sqrt(b^2-4ac)]/2a
this is the solution for any quadratic equation and best way to solve any of them
you will get solution x = 6 and x = 1 equation holds true if x is either 1 or 6
if you want to solve mentally , you will need to factorise the equation
something which mighthelp - think of two numbers which add upto 7(-b) and product is 6 (c)
it is 1 and 6 again otherwise
x^2-7x +6 = x^2 -6x -x + 6 = x(x-6) -(x-6) = (x-1)(x-6)
so rewriting equations as (x-1)(x-6) = 0 , we know the solution is when either x-6 = 0 or x-1 = 0 so that the product will be zero in either case
or x=6 or x = 1
just learn by rote the roots of quadratic eqn , it is necessary
hope i have helped
2009-12-31 5:52 pm
x^2-7x+6=0
(x-1)(x-6)=0
x=1 x=6
(x-1)(x-6)=0
x=1 x=6
2010-01-03 8:40 am
x^2 - 7x + 6 = 0
x^2 - x - 6x + 6 = 0
(x^2 - x) - (6x - 6) = 0
x(x - 1) - 6(x - 1) = 0
(x - 1)(x - 6) = 0
x - 1 = 0
x = 1
x - 6 = 0
x = 6
∴ x = 1, 6 when y = 0.
x^2 - x - 6x + 6 = 0
(x^2 - x) - (6x - 6) = 0
x(x - 1) - 6(x - 1) = 0
(x - 1)(x - 6) = 0
x - 1 = 0
x = 1
x - 6 = 0
x = 6
∴ x = 1, 6 when y = 0.
2009-12-31 4:41 pm
x^2-7x+6=0
(x - 6)(x - 1) = 0
x - 6 = 0
x = 6
and
x - 1 = 0
x = 1
x = {1, 6}
(x - 6)(x - 1) = 0
x - 6 = 0
x = 6
and
x - 1 = 0
x = 1
x = {1, 6}
2009-12-31 4:12 pm
y=x^2-7x+6
y=(x-6)(x-1)
y=0 when x=6 or x=1
y=(x-6)(x-1)
y=0 when x=6 or x=1
2009-12-31 4:27 pm
x=1 or 6
2009-12-31 4:11 pm
x^2-7x+6=0
(x-1)(x-6)=0
x = 1 or 6
(x-1)(x-6)=0
x = 1 or 6
2009-12-31 4:10 pm
heres a step by step
1. x^2-7x+6=0
2. you split it up
(x-6)(x-1)=0
3. x-6=0 x=6
x-1=0 x =1
so x equals 1 and 6
1. x^2-7x+6=0
2. you split it up
(x-6)(x-1)=0
3. x-6=0 x=6
x-1=0 x =1
so x equals 1 and 6
2009-12-31 4:09 pm
I do math differently than a lot of people. Here's my breakdown.
X^2 - 7x = -6
36 - 42 = -6
6^2 - 7(6) = -6
-6 +6 = 0
X = 6
X^2 - 7x = -6
36 - 42 = -6
6^2 - 7(6) = -6
-6 +6 = 0
X = 6
2015-08-14 10:45 pm
This Site Might Help You.
RE:
Algebra help!! solve x^2-7x+6=0?
the answer should be an x and a y, please explain how you got your answer
RE:
Algebra help!! solve x^2-7x+6=0?
the answer should be an x and a y, please explain how you got your answer
參考: algebra solve 2 7x 6 0: https://biturl.im/FeIfr
收錄日期: 2021-05-01 13:00:23
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091231080512AAXTCZG