(-12) × (-130) the sum is ??
Answers
Answered by
4
Answer:
Answer is 1560.Please mark as brainliest.
Answered by
0
Answer:
In △ABC, AD is the median.
By Apollonius theorem,
AB
2
+AC
2
=2AD
2
+2DC
2
c
2
+b
2
=2d
2
+2(
2
1
BC)
2
c
2
+b
2
=2d
2
+
2
a
2
But, c
2
=h
2
+(
2
a
−x)
2
∴h
2
+(
2
a
−x)
2
+b
2
=2d
2
+
2
a
2
h
2
+
4
a
2
−ax+x
2
+b
2
=2d
2
+
2
a
2
But h
2
=d
2
−x
2
d
2
−x
2
−ax+x
2
+b
2
=2d
2
+
4
a
2
ax=b
2
−d
2
−
4
a
2
x=
a
1
[b
2
−d
2
−
4
a
2
]
Hence proved.
Step-by-step explanation:
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