Subtract 5x from both sides to make: 3x-4=8. Add four to both sides and divide by three, x=4.
Answer:
4x^2 - 6x^2 -6x + 3x +3 - 4
Step-by-step explanation:
The terms here involve x^0, x, x^2.
Write the x^2 terms first: 4x^2 - 6x^2;
then write the x terms: -6x + 3x; and
then write the constants: 3 - 4
and so we have, in descending powers of x,
4x^2 - 6x^2 -6x + 3x +3 - 4
Fine the length BC using the cosine law. Google the law and sub it in
