Question

Select the correct answer.

Which expression is equivalent to the given expression?
(14x³y^-4) (4x^-5y^4)
OA. 50
OB. 56x²y
56y
C.
OD. 56x²
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Answer 1

It's A.

Explanation:

(14x³y^-4) (4x^-5y^4)

= 14*4 * x^3*x^-5 * y^-4*y^4

= 56 * x^(3 - 5) * y^(-4+4)

= 56x^-2y^0

= 56x^-2 (as y^0) = 1)

= 56/x^2