Question

which term is the perfect square of 3x^4? a. 6x^8 b. 6x^16 c. 9x^8 d. 9x^16

Answer 1

$(3x^4)^2=3^2(x^4)^2=9x^{4\cdot2}=9x^8\\\\Used:\\)a\cdot b)^n=a^n\cdot b^n\\(a^n)^m=a^{n\cdot m}$