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Answers
Step-by-step explanation:
x 3 - 2
1 3-2 2
1 - 3+2
=3-3
=u
Step-by-step explanation:
STEP
1
:
Equation at the end of step 1
(((x3) + (2•5x2)) - 100x) - 1000
STEP
2
:
Checking for a perfect cube
2.1 x3+10x2-100x-1000 is not a perfect cube
Trying to factor by pulling out :
2.2 Factoring: x3+10x2-100x-1000
Thoughtfully split the expression at hand into groups, each group having two terms :
Group 1: x3+10x2
Group 2: -100x-1000
Pull out from each group separately :
Group 1: (x+10) • (x2)
Group 2: (x+10) • (-100)
-------------------
Add up the two groups :
(x+10) • (x2-100)
Which is the desired factorization
Trying to factor as a Difference of Squares:
2.3 Factoring: x2-100
Theory : A difference of two perfect squares, A2 - B2 can be factored into (A+B) • (A-B)
Proof : (A+B) • (A-B) =
A2 - AB + BA - B2 =
A2 - AB + AB - B2 =
A2 - B2
Note : AB = BA is the commutative property of multiplication.
Note : - AB + AB equals zero and is therefore eliminated from the expression.
Check : 100 is the square of 10
Check : x2 is the square of x1
Factorization is : (x + 10) • (x - 10)
Multiplying Exponential Expressions:
2.4 Multiply (x + 10) by (x + 10)
The rule says : To multiply exponential expressions which have the same base, add up their exponents.
In our case, the common base is (x+10) and the exponents are :
1 , as (x+10) is the same number as (x+10)1
and 1 , as (x+10) is the same number as (x+10)1
The product is therefore, (x+10)(1+1) = (x+10)2
Final result :
(x + 10)2 • (x - 10)
hope it helps
if not then sorry for this