TRUE / FALSE

Question 11 Mark

$(a-b)^2+2 a b=a^2+b^2$.

Answer

$(a – b)^2 + 2ab = a^2 + b^2. ($True$)$

Question 21 Mark

An equation is true for all values of variables in it.

Answer

An equation is true for all values of variables in it. $($False$)$
Correct :
It is true for some specific values of variables.

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Question 31 Mark

Numerical coefficient of $-7 x^3 y$ is $ 7.$

Answer

Numerical coefficient of $-7x^3y$ is $7. ($False$)$
Correct : It is $-7.$

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Question 41 Mark

$3 x^2 y+7 x+8 y+9$ is a polynomial of degree $3.$

Answer

$3x^2y + 7x + 8y + 9$ is a polynomial of degree $3. ($ True $)$

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Question 51 Mark

$5 x+\frac{2}{x}+7$ is a polynomial of degree $1$.

Answer

$5 x+\frac{2}{x}+7$ is a polynomial of degree $1 . ($False$)$
Correct :
$\because \frac{2}{x}$ has negative power of $y$ i.e. $x ^{-1}$.

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Question 61 Mark

$5 x^2 y^2 z, 3 x^2 z y^2,-\frac{4}{5} z x^2 y^2$ are unlike terms.

Answer

$5 x^2 y^2 z, 3 x^2 z y^2,-\frac{4}{5} z x^2 y^2$ are unlike terms. $($False$)$
Correct : They are like terms.

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Question 71 Mark

An algebraic expression is called polynomial if the powers of the variables involved in it in each term are non$-$negative integers.

Answer

An algebraic expression is called polynomial if the powers of the variables involved in it in each term are non$-$negative integers. $($True$)$

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Question 81 Mark

In any term of an algebraic expression the constant part is called literal coefficient of the term.

Answer

In any term of an algebraic expression, the constant part is called literal coefficient of the term. $($False$)$
Correct : It is called the constant coefficient.

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Question 91 Mark

The term of an algebraic expression having no literal factor is called its constant term,

Answer

The term of an algebraic expression having no literal factor is called its constant term. $($True$)$

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Question 101 Mark

A symbol which has fixed value is called a literal.

Answer

A symbol which has fixed value is called a literal. $($False$)$
Correct : It is called constant.

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Question 111 Mark

An algebraic expression having only one term is called a monomial.

Answer

An algebraic expression having only one term is called a monomial. $($True$)$

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MATHS TRUE / FALSE

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