Answer:
4±√5
EXPLAINED ANSWER:
Since the variable is a binomial and it is squared, we apply square root on both side, and apply the ± sign on the right side (since the solution of a square root can be both positive and negative), and later pass the 4 positive to the other side.
√25 can be (5)(5) or (-5)(-5)
Answer: (a)
(b)
(c)
(d)
Step-by-step explanation:
Properties of exponents :
1)
2)
3)
4)
Now , we simplify the given expression using the above properties.
a)
[By property (1)]
[∵ (+)(-)=(-)]
b)
[By property (3)]
[∵ (-)(-)=(+)]
c)
[By property (2)]
[By property (4)]
d)
[By property (3)]