−
9
Explanation:
(
3
i
)
2
=
9
i
2
i
2
=
−
1
,
therefore,
9
i
2
=
9
⋅
(
−
1
)
=
−
9
4 is the common multiple of 2 denominators
Answer:
A
Step-by-step explanation:
A because when you find the product you need to add
Answer:
Solve equation by finding square roots. 49x^2 - 16= -7
49x²-16= -7
49x²= -7 + 16
49x²= 9
find the square root of both sides
7x= 3
x= 3/7
Step-by-step explanation: