nadine15
nadine15
16-12-2019
Mathematics
contestada
Solve the following (c) 60 - x² = 56
Respuesta :
kjbenion
kjbenion
16-12-2019
x
=
−
7
or
x
=
−
8
Explanation:
Find a pair of factors of
56
with sum
15
.
The pair
7
,
8
works in that
7
⋅
8
=
56
and
7
+
8
=
15
Hence:
0
=
x
2
+
15
x
+
56
=
(
x
+
7
)
(
x
+
8
)
So:
x
=
−
7
or
x
=
−
8
Alternative method
Answer Link
lolpotatohead
lolpotatohead
16-12-2019
The answer is 2 your welcome
Answer Link
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