In a group of students. 20 study Account. 21 Study mathematics 18 study history 7 study account only 10 study mathematics only 6
1 answer:
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By the binomial theorem, the term in the expansion of
is
which suggests that the contribution of the binomial coefficient should make up the remaining factor of 21. That is,
Answer:
x=1.3288 or -1.1288
Step-by-step explanation:
Given
Subtract 4x from both sides
Since we can factor out 2 from whole equation, let's factor out 2.
Divide with 2 on both sides
We got the quadratic equation, we can solve for x using quadratic formula.