Answer:
Prime number - 3/6 = 1/2
Head - 1/2
Step-by-step explanation:
prime numbers are 2, 3 and 5 on a die
![-a^2=(-1)\cdot a\cdot a](https://tex.z-dn.net/?f=-a%5E2%3D%28-1%29%5Ccdot%20a%5Ccdot%20a)
Regardless of the sign of
![a](https://tex.z-dn.net/?f=a)
, we have
![a\cdot a=a^2\ge0](https://tex.z-dn.net/?f=a%5Ccdot%20a%3Da%5E2%5Cge0)
(never negative). But multiplying by -1 makes it negative.
On the other hand,
![(-a)^2=((-1)\cdot a)^2=(-1)^2\cdot a^2=1\cdot a^2=a^2](https://tex.z-dn.net/?f=%28-a%29%5E2%3D%28%28-1%29%5Ccdot%20a%29%5E2%3D%28-1%29%5E2%5Ccdot%20a%5E2%3D1%5Ccdot%20a%5E2%3Da%5E2)
which can never be negative for real
![a](https://tex.z-dn.net/?f=a)
.
Answer: 53
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