Which of the following is NOT a perfect square?
A) 49x^2
B) 64a^2
C) 121y^2
D) 125z^2

d)  125z^2

Step-by-step explanation:

A perfect square is a number gotten by square an integer e.g. 4 = 2^2, 9 = 3^3. So, 4 and 9 are perfect squares.

lets take each option

a) 49x^2 = 7^2 * x^2                      This is a perfect square

b) 64a^2 = 8^2 * a^2                      This is a perfect square

c) 121y^2 = 11^2  * y^2                     This is a perfect square

d)  125z^2 = (10^2 + 5^2) * z^2       This is not a perfect square

i dont know

step-by-step explanation: