Solution - Simplification or other simple results
Other Ways to Solve
Simplification or other simple resultsStep by Step Solution
Step 1 :
Equation at the end of step 1 :
(2x2 • x) - 3Step 2 :
Trying to factor as a Difference of Cubes:
2.1 Factoring: 2x3-3
Theory : A difference of two perfect cubes, a3 - b3 can be factored into
(a-b) • (a2 +ab +b2)
Proof : (a-b)•(a2+ab+b2) =
a3+a2b+ab2-ba2-b2a-b3 =
a3+(a2b-ba2)+(ab2-b2a)-b3 =
a3+0+0-b3 =
a3-b3
Check : 2 is not a cube !!
Ruling : Binomial can not be factored as the difference of two perfect cubes
Polynomial Roots Calculator :
2.2 Find roots (zeroes) of : F(x) = 2x3-3
Polynomial Roots Calculator is a set of methods aimed at finding values of x for which F(x)=0
Rational Roots Test is one of the above mentioned tools. It would only find Rational Roots that is numbers x which can be expressed as the quotient of two integers
The Rational Root Theorem states that if a polynomial zeroes for a rational number P/Q then P is a factor of the Trailing Constant and Q is a factor of the Leading Coefficient
In this case, the Leading Coefficient is 2 and the Trailing Constant is -3.
The factor(s) are:
of the Leading Coefficient : 1,2
of the Trailing Constant : 1 ,3
Let us test ....
P | Q | P/Q | F(P/Q) | Divisor | |||||
---|---|---|---|---|---|---|---|---|---|
-1 | 1 | -1.00 | -5.00 | ||||||
-1 | 2 | -0.50 | -3.25 | ||||||
-3 | 1 | -3.00 | -57.00 | ||||||
-3 | 2 | -1.50 | -9.75 | ||||||
1 | 1 | 1.00 | -1.00 | ||||||
1 | 2 | 0.50 | -2.75 | ||||||
3 | 1 | 3.00 | 51.00 | ||||||
3 | 2 | 1.50 | 3.75 |
Polynomial Roots Calculator found no rational roots
Final result :
2x3 - 3
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