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Evaluate the expression
5x^(3) for
x=2.

Evaluate the expression $5 x^{3}$ for $x=2$ .

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Cube roots of positive perfect cubes

Full solution

Q. Evaluate the expression

5 x^{3}

for

x=2

.

Identify given value: Identify the given value for $x$ . We are given that $x = 2$ . We need to substitute this value into the expression $5x^{3}$ .
Substitute value in expression: Substitute the value of $x$ into the expression. $\newline$ Replace $x$ with $2$ in the expression $5x^{3}$ to get $5 \times 2^{3}$ .
Calculate value of $2^{3}$ : Calculate the value of $2^{3}$ . $2^{3}$ means $2$ multiplied by itself $3$ times, which is $2 \times 2 \times 2 = 8$ .
Multiply result by $5$ : Multiply the result from Step $3$ by $5$ . $\newline$ Now, multiply $5$ by $8$ to get $5 \times 8 = 40$ .

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