Question

Simplify (4x– 4)– 3 A. -1/2x^4 B. -8x^12 C. -64x^9 D. x^12/64

Answer 1

X12/64A is the right answer

Answer 2

$Use:(a\cdot b)^n=a^n\cdot b^n\\\\(a^n)^m=a^{n\cdot m}\\\\a^{-n}=\dfrac{1}{a^n}\\\\\left(4x^{-4}\right)^{-3}=4^{-3}(x^{-4})^{-3}=\dfrac{1}{4^3}x^{-4\cdot(-3)}\\\\=\dfrac{1}{64}x^{12}=\boxed{\frac{x^{12}}{64}}$

Answer: D. x^12/64