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 :
26y3 - 1
Step 2 :
Trying to factor as a Difference of Cubes:
2.1 Factoring: 64y3-1
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 : 64 is the cube of 4
Check : 1 is the cube of 1
Check : y3 is the cube of y1
Factorization is :
(4y - 1) • (16y2 + 4y + 1)
Trying to factor by splitting the middle term
2.2 Factoring 16y2 + 4y + 1
The first term is, 16y2 its coefficient is 16 .
The middle term is, +4y its coefficient is 4 .
The last term, "the constant", is +1
Step-1 : Multiply the coefficient of the first term by the constant 16 • 1 = 16
Step-2 : Find two factors of 16 whose sum equals the coefficient of the middle term, which is 4 .
-16 | + | -1 | = | -17 | ||
-8 | + | -2 | = | -10 | ||
-4 | + | -4 | = | -8 | ||
-2 | + | -8 | = | -10 | ||
-1 | + | -16 | = | -17 | ||
1 | + | 16 | = | 17 | ||
2 | + | 8 | = | 10 | ||
4 | + | 4 | = | 8 | ||
8 | + | 2 | = | 10 | ||
16 | + | 1 | = | 17 |
Observation : No two such factors can be found !!
Conclusion : Trinomial can not be factored
Final result :
(4y - 1) • (16y2 + 4y + 1)
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