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Byju's Answer
Standard IX
Mathematics
(x±a)(x±b) = x²±(a+b)x+ab.
Expand: (3a +...
Question
Expand: (3a + 4b + 5c)
2
.
Open in App
Solution
3
a
+
4
b
+
5
c
2
=
3
a
2
+
4
b
2
+
5
c
2
+
2
3
a
4
b
+
2
4
b
5
c
+
2
3
a
5
c
=
9
a
2
+
16
b
2
+
25
c
2
+
24
a
b
+
40
b
c
+
30
a
c
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(x±a)(x±b) = x²±(a+b)x+ab.
Standard IX Mathematics
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