(x-9)²=-3+x
expand
x²-18x+81=-3+x
minus x both sides and add 3
x²-19x+84=0
factor
what 2 numbers multiply to get 84 and add to get -19?
-7 and -12
(x-7)(x-12)=0
set equal to 0
x-7=0
x=7
x-12=0
x=12
the number is 7 or 12
both work
This is really weird.
-- NONE of the situations matches the equation at the top.
-- And the equation at the top isn't even really any big deal . . .
it's <em>always</em> true, no matter what ' t ' is . If you remove all of
the parentheses and simplify it, it says that 6 = 6. Well duh !
Answer:
Step-by-step explanation:
<u>Factoring</u>
Binomial factoring is a common task when solving a great variety of math problems.
One of the best-known formula that helps us to factor a binomial is:
It can easily be identified because the expression is the difference between two perfect squares.
The expression
can be factored with the formula above since it's the difference of two squares:
The expression is factored as follows:
1 1/2 or 3/4
either or should work
7.6x = 64
x = 64/7.6
x =
<span>
<span>
<span>
8.4210526316
</span>
</span>
</span>
So, 3.05 is NOT the solution