Question

A: What are the solutions to the quadratic equation x^2+9=0?

B: What is the factored form of the quadratic expression x^2+9?
Select one answer for question A, and select one answer for question B.
A: x=3
A: x=-3i
A: x=3i or x=-3i
A: x=3 or x=-3
B: (x+3)(x+3)
B: (x-3i)(x-3i)
B: (x+3i)(x-3i)
B: (x+3)(x-3)

Answer 1

Part A)

x=-3i

x=3i

Part B)

(x+3i)(x-3i)

Explanation:

Given:

Part A)

x^2+9=0

x^2=-9

x= √-9

x=√-1 *√9

x=± i *3

x=±3i

Part B)

x^2+9=0

x^2 - (-9)=0

x2-(3i)^2=0

(x-3i)(x+3i)=0 !