Question

Which expression is equivalent to (7x^2)(3x^-4)

A. 21X ^-8
B. 21X^2
C. 21X^-6
D. 21X ^-2

Answer 1

the answer is b

Explanation:

heres why:

(7x^2)(3x^-4)

7x3=21x

21/x^4

21/x²