Question

which of the following is not an expression with numbers only ? (a) 2x(3+4) (b)(2+3)x4 (c)2x3+4x5 (d)2x+1​

Answer 1

Answer:(d) 2x+1

Step-by-step explanation:

Because 2 multiply plus 1 is not any expression

Answer 2

Given,

Four expression (a) 2x(3+4),  (b) (2+3)x4, (c) 2x3+4x5  (d)2x+1

To find,

Which among the four equations is not an expression with numbers only.

Solution,

• The first expression 2x(3+4) is an expression that has numbers only and their result would also be a number.

        ⇒    2x(3+4) =  2x(7)

        ⇒    2x(3+4)  = 14.

• The second expression (2+3)x4 is an expression that has numbers only and their result would also be a number.

         ⇒  (2+3)x4 =  5x4

         ⇒    (2+3)x4  = 20

• The third expression (2x3)+(4x5) is an expression that has numbers only and their result would also be a number.

        ⇒   (2x3)+(4x5) = 6 +20

         ⇒   (2x3)+(4x5) = 26

• The fourth expression 2x+1​ is a linear expression in one variable that has x as a variable and 1 as a constant term.

Hence, 2x + 1 is the expression that does not have numbers only. (Option d).