Solution - Simplification or other simple results
Other Ways to Solve:
Step by Step Solution
Step 1 :
Trying to factor by splitting the middle term
1.1 Factoring k2+14k+45
The first term is, k2 its coefficient is 1 .
The middle term is, +14k its coefficient is 14 .
The last term, "the constant", is +45
Step-1 : Multiply the coefficient of the first term by the constant 1 • 45 = 45
Step-2 : Find two factors of 45 whose sum equals the coefficient of the middle term, which is 14 .
| -45 | + | -1 | = | -46 | ||
| -15 | + | -3 | = | -18 | ||
| -9 | + | -5 | = | -14 | ||
| -5 | + | -9 | = | -14 | ||
| -3 | + | -15 | = | -18 | ||
| -1 | + | -45 | = | -46 | ||
| 1 | + | 45 | = | 46 | ||
| 3 | + | 15 | = | 18 | ||
| 5 | + | 9 | = | 14 | That's it |
Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above, 5 and 9
k2 + 5k + 9k + 45
Step-4 : Add up the first 2 terms, pulling out like factors :
k • (k+5)
Add up the last 2 terms, pulling out common factors :
9 • (k+5)
Step-5 : Add up the four terms of step 4 :
(k+9) • (k+5)
Which is the desired factorization
Final result :
(k + 9) • (k + 5)
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