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 a2+11a+18
The first term is, a2 its coefficient is 1 .
The middle term is, +11a its coefficient is 11 .
The last term, "the constant", is +18
Step-1 : Multiply the coefficient of the first term by the constant 1 • 18 = 18
Step-2 : Find two factors of 18 whose sum equals the coefficient of the middle term, which is 11 .
| -18 | + | -1 | = | -19 | ||
| -9 | + | -2 | = | -11 | ||
| -6 | + | -3 | = | -9 | ||
| -3 | + | -6 | = | -9 | ||
| -2 | + | -9 | = | -11 | ||
| -1 | + | -18 | = | -19 | ||
| 1 | + | 18 | = | 19 | ||
| 2 | + | 9 | = | 11 | That's it |
Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above, 2 and 9
a2 + 2a + 9a + 18
Step-4 : Add up the first 2 terms, pulling out like factors :
a • (a+2)
Add up the last 2 terms, pulling out common factors :
9 • (a+2)
Step-5 : Add up the four terms of step 4 :
(a+9) • (a+2)
Which is the desired factorization
Final result :
(a + 9) • (a + 2)
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