Minus x cube plus x square minus 21x minus 45 =0 find the roots of the equation
Answers
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Step-by-step explanation:
Let's solve your equation step-by-step.
−
x
3
−
x
2
+
21
x
+
45
=
0
Step 1: Factor left side of equation.
(
−
x
−
3
)
(
x
+
3
)
(
x
−
5
)
=
0
Step 2: Set factors equal to 0.
−
x
−
3
=
0
or
x
+
3
=
0
or
x
−
5
=
0
x
=
−
3
or
x
=
−
3
or
x
=
5
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