When asked to factor the trinomial 4x^2+12x+9 a student gives the answer (2x-3)(2x-3) what is one thing wrong with this answer
2 answers:
Answer:
The minus sign must be plus sign. Option D
Step-by-step explanation:
Given quadratic is 4x²+12x+9
Find the factor of given quadratic. We use complete square method to find the factor.
Take common 4
4(x²+3x) + 9
=4(x² + 3x +) + 9 - 9
=4(x +)²
=
=(2x+3)²
=(2x+3)(2x+3)
In student's answer the minus sign must be plus sign.
That's the final answer.
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Answer:
The Probability that Event A and Event D occur is equal to the probability Event A occurs times the probability that Event D occurs, given that A has occurred.
We can find the values of and
using the above form formula.
;
From the given table, we have the values of P(A), P(D), and
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Since, Probability=
∴,
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and
Now, putting these values in above formula we get,
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As, you can see above that the values of P(A|D) and P(D|A) are not equal.