Question

Which expression is equal to 5^4 x 5^8 ?

A: 5^12
B: 5^4
C: 5^2
D: 5^−4

Answer 1

A is the correct answer when you multip the same numbers you just summe the exp 4+8 = 12

Answer 2

When multiplying the same numbers with exponents, you can add the exponents up.

For example, $a^2 \times a^3 = a^2^+^3 = a^5$

$5^4 \times 5^8=5^4^+^8 = 5^1^2$

Your answer is A) $5^1^2$.