young1
young1
24-02-2015
Mathematics
Answered
factoring by grouping how do i solve it 8r^3-64^2+r-8
Answer :
heyDB
heyDB
24-02-2015
Squaring a number is the same as multiplying the number by itself
(
64⋅64
).
In this case,
64
squared is
4096.
8
r^3
−4096+r−8
Subtract 8
from
−4096
to get
−4104
.
8
r^3
−4104+r
Factor
the
polynomial
using the rational
roots
theorem.
(r−8)(8
r^2
+64r+513)
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