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Standard VIII
Maths
Operations on Algebraic Expressions
Question
Subtract the second polynomial from the first.
$$2ab^{2} + 3a^{2}b - 4ab, \\ 3ab - 8ab^{2} + 2a^{2}b$$
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Solution
Verified by Toppr
To find: = $$(2ab^{2} + 3a^{2}b - 4ab) - (3ab - 8ab^{2} + 2a^{2}b)$$
$$=2ab^{2} + 3a^{2} b - 4ab - 3ab + 8 ab^{2} - 2a^{2}b$$
$$=2ab^{2} + 8ab^{2} + 3a^{2}b - 2a^{2} b - 4ab - 3ab $$
$$=10ab^{2} + a^{2}b - 7ab$$
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Similar Questions
Q1
Subtract the second polynomial from the first.
$$2ab^{2} + 3a^{2}b - 4ab, \\ 3ab - 8ab^{2} + 2a^{2}b$$
View Solution
Q2
Subtract the second polynomial from the first.
(i)
x
2
-
9
x
+
3
;
-
19
x
+
3
+
7
x
2
(ii)
2
a
b
2
+
3
a
2
b
-
4
a
b
;
3
a
b
-
8
a
b
2
+
2
a
2
b
View Solution
Q3
Do the following mathematical operations on the given polynomials.
A. Add:
x
3
−
2
x
2
−
9
a
n
d
5
x
3
+
2
x
+
9
.
B. Subtract:
2
a
b
2
+
3
a
2
b
−
4
a
b
f
r
o
m
3
a
b
−
8
a
b
2
+
2
a
2
b
.
View Solution
Q4
Add the following polynomials.
(
i
)
x
2
−
9
x
+
√
3
:
−
19
x
+
√
3
+
7
x
2
(
i
i
)
2
a
b
2
+
3
a
2
b
−
4
a
b
;
3
a
b
−
8
a
b
2
+
2
a
2
b
View Solution
Q5
Subtract:
(a) x
2
– 1 from x
2
+ 1
(b) 2x
2
– 11x + 3 from x
2
+ 15x – 1
(c) 3xy + 5yz – 7zx from 5xy – 2yz – 2zx + 10xyz
(d) 3a
2
b + 5ab – 7ab
2
from 2a
2
b + 8ab + 8ab
2
View Solution