Exam problems

[imaginary # hater]

Hi, I was just wondering if somebody could make some problems of simpliyfing and solve polynomials with X as the variable. I have my math Exam tommorow and just wanted to get a few more practice problems in i already finished three work sheets.

 

[mmm4444bot]

FIND ALL SOLUTIONS FOR X

\(\displaystyle -\frac{3}{4} \cdot x^2 \; - \; \frac{2}{5} \cdot x \; + \; \frac{7}{4} \; = \; \frac{5}{3}\)

 

[fasteddie65]

(-3/4)x^2 - (2/5)x + 7/4 = 5/3

First multiply by the LCM (60) to clear the fractions:

-45x^2 - 24x + 105 = 100
-45x^2 - 24x + 5 = 0

Next, multiply or divide by -1 to make the coefficient of x^2 positive:
45x^2 + 24x - 5 = 0

I would suggest using the Quadratic Formula to finish the problem.

 

[Denis]

What's your point, Fastone? Mark was simply giving student an example problem, as requested by student :shock:

 

[imaginary # hater]

thanks guys wish you had not solved it so far fasteddie but thanks. took my exam today forgot cramer's rule :x. other then that think i did good. 1/4 of the test was matrixs thank god i know how to solve them on my calc.