Asked by jessica

solve the linear equation
-10.8x + 1.4 = -47.6 - 1.0x
Answered by chandice
Use the discriminant to determine how many real-number solutions the equation has.
v^2 - 7v + 5 = 0
Answered by TeacherJim
jessica, bring the x terms together and the simple numbers together, then you can just divide across:

-10.8x + 1.4 = -47.6 - 1.0x

-10.8x + 1.0x = -47.6 - 1.4

-9.8x = -49

x = -49/-9.8

Check my arithmetic, and finish from there.
Answered by TeacherJim
chandice, it's better to post a new message when you have a new question.

Anyway, the discriminant of a quadratic is b^2-4ac, the bit inside the square root sign of the quadratic formula.

In this case:
b^2-4ac
=7^2-4*5

which is greater than zero. What does that tell you about the roots?
Answered by candy
how many real-number solutions does the equation have?
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