Solution - Simplification or other simple results
Step by Step Solution
Step 1 :
Equation at the end of step 1 :
(2x2 + 21x) + 49
Step 2 :
Trying to factor by splitting the middle term
2.1 Factoring 2x2+21x+49
The first term is, 2x2 its coefficient is 2 .
The middle term is, +21x its coefficient is 21 .
The last term, "the constant", is +49
Step-1 : Multiply the coefficient of the first term by the constant 2 • 49 = 98
Step-2 : Find two factors of 98 whose sum equals the coefficient of the middle term, which is 21 .
| -98 | + | -1 | = | -99 | ||
| -49 | + | -2 | = | -51 | ||
| -14 | + | -7 | = | -21 | ||
| -7 | + | -14 | = | -21 | ||
| -2 | + | -49 | = | -51 | ||
| -1 | + | -98 | = | -99 | ||
| 1 | + | 98 | = | 99 | ||
| 2 | + | 49 | = | 51 | ||
| 7 | + | 14 | = | 21 | That's it |
Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above, 7 and 14
2x2 + 7x + 14x + 49
Step-4 : Add up the first 2 terms, pulling out like factors :
x • (2x+7)
Add up the last 2 terms, pulling out common factors :
7 • (2x+7)
Step-5 : Add up the four terms of step 4 :
(x+7) • (2x+7)
Which is the desired factorization
Final result :
(2x + 7) • (x + 7)
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