Question

Evaluate for x=6: (a)x³ (b)4^x (c)6x²-4x-7

Short answer

The value of the expressions for x=6 are:

(a)216

(b)64

(c)185

Step-by-step solution

Given information

The given Algebraic expressions are:

(a)x³ (b)4^x (c)6x²-4x-7

We have to evaluate the given expressions for x=6.

Part (a) Step 1 Evaluate the expression for x=6

The expression is x³

Replace x with 6 :

6³

=216

The value of the expression is 216.

Part (b) Step 1  Evaluate the expression for x=6.

The expression is 2^x

Replace x with 6 :

2⁶

=64

The value of the expression is 64.

Part (c) Step 1 Evaluate the expression for x=6.

The expression is 6x²-4x-7

Replace x with 6 :

6(6)²-4(6)-7

=216-24-7

=185

The value of the expression is 185.