Question

please help me, if x = -2, y = 1, and z = 5, 2xyz^3 + x^2 - z^2 is -521 or -471 ?????

Answer 1

2xyz^3 + x^2 - z^2
= 2(-2)(1)(5)^3 + (-2)^2 - (5)^2
= (-4)(125) + 4 - 25
= -500 - 21
= -521

Answer 2

thankyou @Kira_Yamato