rafa1392004 rafa1392004

07-12-2020
Mathematics

contestada

Find all the real zeros of the function : f(x) = -3x (x²-25) (x-5)

Respuesta :

07-12-2020

The zeroes (or 'roots') of a function occur when it crosses the x-axis, the line
y
=
0
. Let
x
2
−
25
=
0
. Rearranging
x
2
=
25
→
x
=
±
√
25
=
±
5
. The roots are
+
5
and
−
5
.

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