Identify a common factor (other than 1) of the terms in the expression −7x+21
2 answers:
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The value of c for which the considered trinomial becomes perfect square trinomial is: 20 or -20
<h3>What are perfect squares trinomials?</h3>They are those expressions which are found by squaring binomial expressions.
Since the given trinomials are with degree 2, thus, if they are perfect square, the binomial which was used to make them must be linear.
Let the binomial term was ax + b(a linear expression is always writable in this form where a and b are constants and m is a variable), then we will obtain:
Comparing this expression with the expression we're provided with:
we see that:
Thus, the value of c for which the considered trinomial becomes perfect square trinomial is: 20 or -20
Learn more about perfect square trinomials here:
Answer:
Step-by-step explanation:
From the problem statement, we can setup the following equation:
where is the number of months that Rachel has saved up money.
Dividing both sides by 35, we get the answer: