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Byju's Answer
Standard VII
Mathematics
Addition of Algebraic Expressions
Find the sum ...
Question
Find the sum of
5
x
²
+
3
x
y
−
4
y
²
and
−
9
x
²
+
6
x
y
+
7
y
²
.
A
−
4
x
²
+
9
x
y
+
3
y
²
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B
4
x
²
−
9
x
y
−
3
y
²
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C
−
4
x
²
−
9
x
y
+
3
y
²
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D
−
4
x
²
+
9
x
y
−
3
y
²
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Solution
The correct option is
A
−
4
x
²
+
9
x
y
+
3
y
²
5
x
²
+
3
x
y
−
4
y
²
+
(
−
9
x
²
+
6
x
y
+
7
y
²
)
=
(
5
x
²
−
9
x
²
)
+
(
3
x
y
+
6
x
y
)
+
(
−
4
y
²
+
7
y
²
)
=
−
4
x
²
+
9
x
y
+
3
y
²
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0
Similar questions
Q.
The sum of two binomials is (5x - 6xy + 7y - 30). If one of the binomial is (3xy - 2x + y), what is the other binomial?
Q.
Solve the following system of equations by elimination method.
11
x
−
7
y
=
x
y
,
9
x
−
4
y
=
6
x
y
Q.
Form the sum of
3
x
2
+
2
2
,
−
x
2
−
4
y
2
+
4
x
y
and
6
x
y
+
2
x
2
−
3
y
2
subtract
−
5
x
2
+
2
y
2
−
3
x
y
Q.
Question 81 (iv)
Add :
5
x
2
−
3
x
y
+
4
y
2
−
9
,
7
y
2
+
5
x
y
−
2
x
2
+
13
Q.
Simplify:
6
x
y
−
4
y
+
6
−
9
x
.
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