Class 8 Algebraic Expressions And Identities CBSE Questions & Answers

Which of the following is an expression?

Which of the following is a binomial?

Which of the following is like term as 7xy?

Add: 7xy + 5yz – 3zx, 4yz + 9zx – 4y , –3xz + 5x – 2xy.

Terms are added to form ___________.

Expression that contains only one term is called a __________.

Using identity \(\left( {{\text{x }}-{\text{ a}}} \right){\text{ }}\left( {{\text{x }} + {\text{ a}}} \right){\text{ }} = {\text{ }}{{\text{x}}^{{\text{2}}}}-{\text{ }}{{\text{a}}^{\text{2}}}\)find \({{\text{6}}^{\text{2}}}-{\text{ }}{{\text{5}}^{\text{2}}}\).

Simplify: \({\left( {{\text{xy }} + {\text{ yz}}} \right)^{\text{2}}}-{\text{ }}{\left( {{\text{xy }}-{\text{ yz}}} \right)^{\text{2}}}\)

Simplify\({\left( {{\text{xy }} + {\text{ yz}}} \right)^{\text{2}}}-{\text{ 2}}{{\text{x}}^{\text{2}}}{{\text{y}}^{\text{2}}}{\text{z}}\). Find the value when x = -1, y = 1 and z = 2.

Using identity \(\left( {{\text{x - a}}} \right){\text{ }}\left( {{\text{x }} + {\text{ a}}} \right){\text{ }} = {\text{ }}{{\text{x}}^{{\text{2}}}}{\text{ - }}{{\text{a}}^{\text{2}}}\) find \({{\text{5}}^{\text{2}}}-{\text{ }}{{\text{4}}^{\text{2}}}.\)

Which of the following is an expression?

Which of the following is a monomial?

Which of the following is like term as\({\text{4}}{{\text{a}}^{\text{2}}}{\text{b}}\)?

Subtract \({\text{7x }}-{\text{ 3}}{{\text{x}}^{\text{2}}}\)from\({\text{4x }} + {\text{ 8}}{{\text{x}}^{\text{2}}}\).

Expressions consists of _____________ and _______________.