The first step in the process for factoring the trinomial x^2-5x-36 is to:
2 answers:
Answer:
D. List all the factors of 36.
Step-by-step explanation:
We are given the following information in the question:
We have to factorize the above expression.
To do so, we use the technique of splitting the middle term.
The first step in finding these factors is to find a pair of factors whose sum is -5 and whose product is -36.
Thus, we need to list all the factors of 36 and then find the factors of -36 and find a pair such that the sum of factors is -5.
The factors could be find in the following manner:
The factors are (x+4) and (x-9).
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Answer:
15. x = 4
16. a = 19
Step-by-step explanation:
"Cross multiply" essentially means "multiply both sides of the equation by the product of the denominators."
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<h3>15.</h3>
This is an example of a problem in which cross-multiplying introduces the need for an extra step: divide by 3. Had we simply multiplied by the denominator of the x-term, we would have been finished in one step:
x = 6(2/3) = 4
That is, rather than multiplying by the <em>product of the denominators</em>, sometimes the problem can be solved more easily if you multiply by their <em>least common multiple</em>.
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<h3>16.</h3>