Question

Evaluate the exponential expression $x^5$ × $x^4$, for x = 2.

• A. 32
• B. 128
• C. 256
• D. 512

Answer 1

The correct option is D

512

$x^5$ × $x^4$, for x = 2
Substituting 2 in place of $x$
= $2^5$× $2^4$
= $2^9(\because a^m\times a^n=a^{m+n})$ = 512