3 years ago

An equation is shown -4/5 (9x-20)-3x 4/5 x -6

Mathematics

1 answer:

Amanda [17]3 years ago

5 0

Answer: x=2

Step-by-step explanation:

if u plug in the value of x=2 into the equation both sides equal -22/5

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4 years ago

determining the number of roots of the equation 8x^3+12x^2-50x+135=0 and find also the interval(s) that isolate the roots.Are th

professor190 [17]

Answer:

one negative real root in [-5, -4]; two complex roots
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Step-by-step explanation:

A graphing calculator is a wonderful tool for this. It shows the one real root to be near -4.062, so between -5 and -4.

The value of the cubic at x = -5 is -315; at -4 it is +15, so the root is definitely between those values.

The one real root is isolated to being between (-5, -315) and (-4, 15). The complex roots are not isolated.

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