Solve 3x^2-x=10 A:x=2 and x=-15 B:x=-5 and x=2/3 C:x=-5/3 and x=2 D:x=-3 and x=10

Danniel asked Sep 18, 2022

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31 votes

Solve 3x^2-x=10

A:x=2 and x=-15
B:x=-5 and x=2/3
C:x=-5/3 and x=2
D:x=-3 and x=10

Danniel asked Sep 18, 2022

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13 votes

Answer:

Explanation:

∆=b^2-4a*c=1-4*3*(-10)=121>0 có 2x

x1=-b+sprt∆/2a=1+sprt121/2*3=2

x2=-b-sprt∆/2a=1-sprt121/2*3=-5/3

Pavel Shliaha answered Sep 22, 2022

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