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 :
(3x2 • x) - 10Step 2 :
Trying to factor as a Difference of Cubes:
2.1 Factoring: 3x3-10
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 : 3 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) = 3x3-10
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 3 and the Trailing Constant is -10.
The factor(s) are:
of the Leading Coefficient : 1,3
of the Trailing Constant : 1 ,2 ,5 ,10
Let us test ....
| P | Q | P/Q | F(P/Q) | Divisor | |||||
|---|---|---|---|---|---|---|---|---|---|
| -1 | 1 | -1.00 | -13.00 | ||||||
| -1 | 3 | -0.33 | -10.11 | ||||||
| -2 | 1 | -2.00 | -34.00 | ||||||
| -2 | 3 | -0.67 | -10.89 | ||||||
| -5 | 1 | -5.00 | -385.00 | ||||||
| -5 | 3 | -1.67 | -23.89 | ||||||
| -10 | 1 | -10.00 | -3010.00 | ||||||
| -10 | 3 | -3.33 | -121.11 | ||||||
| 1 | 1 | 1.00 | -7.00 | ||||||
| 1 | 3 | 0.33 | -9.89 | ||||||
| 2 | 1 | 2.00 | 14.00 | ||||||
| 2 | 3 | 0.67 | -9.11 | ||||||
| 5 | 1 | 5.00 | 365.00 | ||||||
| 5 | 3 | 1.67 | 3.89 | ||||||
| 10 | 1 | 10.00 | 2990.00 | ||||||
| 10 | 3 | 3.33 | 101.11 |
Polynomial Roots Calculator found no rational roots
Final result :
3x3 - 10
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