Expressions & (+/-) Polynomial Review Warmup

Answer explanation

To add the polynomials, combine like terms: (2x^3 + x^3) + (3x^2 - 2x^2) + (-x + 5x) + 4 + (-1) = 3x^3 + x^2 + 4x + 3

Answer explanation

To subtract the polynomials, combine like terms. (5x^2 + x - 1) - (4x^2 - 3x + 2) = x^2 + 4x - 3. Therefore, the correct choice is x^2 + 4x - 3.

• 2

• 3

• 4

• 5

Answer explanation

The degree of the polynomial is determined by the highest power of x in the polynomial. In this case, the highest power is 5, so the degree of the polynomial is 5.

Definition of a constant

• Parts of an expression separated by + and - signs

• The number multiplied times a product of variables or powers of variables in a term

• A term or expression with no variables

• The numbers or expressions that when multiplied produce a given product

Answer explanation

A term or expression with no variables

Definition of a term.

• Parts of an expression separated by + and - signs

• The number multiplied times a product of variables or powers of variables in a term

• A term or expression with no variables

• The numbers or expressions that when multiplied produce a given product

Answer explanation

Parts of an expression separated by + and - signs

A variable is a ________________ or __________________ that represents an unknown value.

• letter or symbol

• term or expression

• constant or coefficient

• noughts or crosses

Answer explanation

A variable is represented by a letter or symbol because it stands for an unknown value in mathematical expressions.

The coefficient is a number multiplied by a variable. It is the number in _______________ of the variable.

• in front

• behind

Answer explanation

The coefficient is the number in front of the variable, so the correct answer is 'in front'. It is the number multiplied by the variable before any other terms.