Solve the quadratic equation using the Quadratic Formula: 3x^2 - 2x - 2 = 0
2007-10-10 13:05:53 · 7 answers · asked by sara 1 in Science & Mathematics ➔ Mathematics
Your equation is already in the right format:
ax² + bx + c = 0
Your specific values are:
a = 3
b = -2
c = -2
Now plug that into the quadratic formula:
...... -b ± sqrt( b² - 4ac)
x = --------------------------
.................. 2a
...... -(-2) ± sqrt( (-2)² - 4(3)(-2) )
x = --------------------------------------
.................. 2(3)
...... 2 ± sqrt( 4 - (-24) )
x = --------------------------
.................. 6
...... 2 ± sqrt( 28 )
x = ------------------
............... 6
...... 2 ± sqrt( 4 * 7 )
x = ---------------------
............... 6
...... 2 ± 2 sqrt( 7 )
x = --------------------
............... 6
...... 1 ± sqrt( 7 )
x = -----------------
............... 3
So your answers are:
x = (1+√7) / 3 ≈ 1.21525
x = (1-√7) / 3 ≈ -0.54858
2007-10-10 13:10:20 · answer #1 · answered by Puzzling 7 · 0⤊ 0⤋
a million. D 2. D 3. D 4. B 5. D 6. B 7. B 8. D 9. D 10. D 11. D 12. C 13. A 14. C 15. B 16. A 17. a million=B, 2=A, 3=D, 4=C 18. B 19. a million=B, 2=A, 3=D, 4=C 20. C 21. A 22. D 23. C 24. C 25. B
2016-10-09 00:01:19 · answer #2 · answered by smyers 4 · 0⤊ 0⤋
I'm relaxing here . . . why would I want to solve an equation as that ?
Another thought . . . questions as this posted during the school year often draw my mind to wonder if the person asking the question is a student trying to cheat and have another think and do their homework for them.
Additional note . . . I just looked at you past questions and they are about you asking the answer to some math equation. Trying to get others to do your homework?
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2007-10-10 13:10:57 · answer #3 · answered by Anonymous · 0⤊ 0⤋
3x^2 - 2x -2 = o
a x^2 -b x - c = o
x = 2 + or - (square root of 4 +24 ) / 6
x = (2 +/ - 5.3) / 6
x = 7.3/6 or -3.3/6
x = 1 and 13/6 or -11/20
2007-10-10 13:13:41 · answer #4 · answered by Anonymous · 0⤊ 1⤋
the answer is 0. that was way too easy
2007-10-10 13:09:19 · answer #5 · answered by Bing Bong Bao 3 · 0⤊ 1⤋
A=3
B=-2
C=-2
Answersx=1.215 or -.548
2007-10-10 13:10:08 · answer #6 · answered by ilovethephillies 2 · 0⤊ 0⤋
dunno really not good at math
2007-10-10 13:08:54 · answer #7 · answered by Jr A 1 · 0⤊ 1⤋