Question

Add: 9xy - 3yz + 2zx; 2xz + 9xy - 4y and -2xz + 5x + 3xy.

Solution

We write the expressions in separate rows, keeping like terms in the same column:

        9xy -3yz + 2zx
    + 9xy        + 2zx - 4y
     + 3xy         - 2 zx + 5x
____________________________
   21xy -3yz + 2zx -4y +5x
In the above example, -4y and 5x are carried over as they are, because they have no like terms. II. xz is same as zx.

Some More Questions From Algebraic Expressions and Identities Chapter

Construct:
(a) 3 binomials with only x as a variable;

(b) 3 binomials with x and y as variables;

(c) 3 monomials with x and y as variables;

(d) 2 polynomials with 4 or more terms.

write two terms which are like
(i) 7xy (ii) 4mn² (iii) 21.

Identify the terms, their coefficients for each of the following expressions.
1 + x + x²

3 - pq + pr - rp

03.a - 0.6ab + 0.5b

Classify the following polynomials as monomials, binomials, trinomials. Which polynomials do not fit in any of these three categories?

x + y, 1000, x + x²+x³+x^4,7 + y +5x, 2y - 3y²+4y² , 4z -15x², ab +bc + cd +da, p²q + pq², 2p + 2q.

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Algebraic Expressions And Identities

Add: 9xy - 3yz + 2zx; 2xz + 9xy - 4y and -2xz + 5x + 3xy.

Some More Questions From Algebraic Expressions and Identities Chapter

Construct:
(a) 3 binomials with only x as a variable;

(b) 3 binomials with x and y as variables;

(c) 3 monomials with x and y as variables;

(d) 2 polynomials with 4 or more terms.

write two terms which are like
(i) 7xy (ii) 4mn² (iii) 21.

Identify the terms, their coefficients for each of the following expressions.
1 + x + x²

3 - pq + pr - rp

03.a - 0.6ab + 0.5b

Classify the following polynomials as monomials, binomials, trinomials. Which polynomials do not fit in any of these three categories?

x + y, 1000, x + x²+x³+x^4,7 + y +5x, 2y - 3y²+4y² , 4z -15x², ab +bc + cd +da, p²q + pq², 2p + 2q.

Add the following:

ab - bc, bc - ca, ca - ab

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

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For Daily Free Study Material Join wiredfaculty

Algebraic Expressions And Identities

Add: 9xy - 3yz + 2zx; 2xz + 9xy - 4y and -2xz + 5x + 3xy.

Some More Questions From Algebraic Expressions and Identities Chapter

Construct: (a) 3 binomials with only x as a variable; (b) 3 binomials with x and y as variables; (c) 3 monomials with x and y as variables; (d) 2 polynomials with 4 or more terms.

write two terms which are like (i) 7xy (ii) 4mn2 (iii) 21.

Identify the terms, their coefficients for each of the following expressions.1 + x + x2

3 - pq + pr - rp

03.a - 0.6ab + 0.5b

Classify the following polynomials as monomials, binomials, trinomials. Which polynomials do not fit in any of these three categories?x + y, 1000, x + x2+x3+x4, 7 + y +5x, 2y - 3y2+4y2 , 4z -15x2 , ab +bc + cd +da, p2q + pq2 , 2p + 2q.

Add the following:ab - bc, bc - ca, ca - ab

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Construct:
(a) 3 binomials with only x as a variable;

(b) 3 binomials with x and y as variables;

(c) 3 monomials with x and y as variables;

(d) 2 polynomials with 4 or more terms.

write two terms which are like
(i) 7xy (ii) 4mn² (iii) 21.

Identify the terms, their coefficients for each of the following expressions.
1 + x + x²

Classify the following polynomials as monomials, binomials, trinomials. Which polynomials do not fit in any of these three categories?

x + y, 1000, x + x²+x³+x^4,7 + y +5x, 2y - 3y²+4y² , 4z -15x², ab +bc + cd +da, p²q + pq², 2p + 2q.

Add the following:

ab - bc, bc - ca, ca - ab