Solution - Simplification or other simple results
Step by Step Solution
Step 1 :
Trying to factor by splitting the middle term
1.1 Factoring x2+13x+36
The first term is, x2 its coefficient is 1 .
The middle term is, +13x its coefficient is 13 .
The last term, "the constant", is +36
Step-1 : Multiply the coefficient of the first term by the constant 1 • 36 = 36
Step-2 : Find two factors of 36 whose sum equals the coefficient of the middle term, which is 13 .
| -36 | + | -1 | = | -37 | ||
| -18 | + | -2 | = | -20 | ||
| -12 | + | -3 | = | -15 | ||
| -9 | + | -4 | = | -13 | ||
| -6 | + | -6 | = | -12 | ||
| -4 | + | -9 | = | -13 | ||
| -3 | + | -12 | = | -15 | ||
| -2 | + | -18 | = | -20 | ||
| -1 | + | -36 | = | -37 | ||
| 1 | + | 36 | = | 37 | ||
| 2 | + | 18 | = | 20 | ||
| 3 | + | 12 | = | 15 | ||
| 4 | + | 9 | = | 13 | That's it |
Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above, 4 and 9
x2 + 4x + 9x + 36
Step-4 : Add up the first 2 terms, pulling out like factors :
x • (x+4)
Add up the last 2 terms, pulling out common factors :
9 • (x+4)
Step-5 : Add up the four terms of step 4 :
(x+9) • (x+4)
Which is the desired factorization
Final result :
(x + 9) • (x + 4)
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