Factor the following expression completely 16a + 20
2 answers:
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Answer:
The answer is 91
Step-by-step explanation:
We have the following equality:
Then a must satisfy that . So,
or
.
1) If a=7, then, it follows for the first equality that 56=14b. Then b=4. Finally, substituting b=4 in the first equality we obtain that -64=16-c. So, c= 80. We conclude that
.
As the problem states, we only consider values of a greater than zero. Then 91 is the only solution for .