patrick2
patrick2
15-05-2015
Mathematics
Answered
2x^2-3x-2=0 zero product property
Answer :
naǫ
naǫ
15-05-2015
[tex]2x^2-3x-2=0 \\ 2x^2-4x+x-2=0 \\ 2x(x-2)+1(x-2)=0 \\ (2x+1)(x-2)=0 \\ 2x+1=0 \ \lor \ x-2=0 \\ 2x=-1 \ \lor \ x=2 \\ x=-\frac{1}{2} \ \lor \ x=2 \\ \boxed{x=-\frac{1}{2} \hbox{ or } x=2}[/tex]
Answer Link
Panoyin
Panoyin
15-05-2015
2x² - 3x - 2 = 0
x =
-(-3) +/- √((-3)² - 4(2)(-2))
2(2)
x =
3 +/- √(9 + 16)
4
x =
3 +/- √(25)
4
x =
3 +/- 5
4
x =
3 + 5
or x =
3 - 5
4 4
x =
8
x =
-2
4 4
x = 2 x = ⁻¹/₂
Answer Link
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