Answer:
64 shouldnt be negative anymore
Explanation:
(-8x^2y^2)^2 = -64x^4y^4
when exapnding the left side it would be...
(-8x^2y^2)^2
Apply exponent rule (-a)^n = a^n
→ (8x^2y^2)^2
→ (8^2)(x^2)^2
→ (8^2) = 64
→ 64(x^2)^2 = 64x^4
Hope this helps. Let me know if you have any questions !
Have a nice rest of you day :)