Answer:
5 is your answer lol :) Give me brainliest
Step-by-step explanation:
Step-by-step explanation:
I'm sorry if I'm wrong, but I'm trying. I think it's -10, because if you think of it, you may think that oh, it's going to be the oppisite, so I got -10. If I'm wrong, I'm very sorry.
Answer:
B
Step-by-step explanation:
Note that i² = - 1
Given
(4 - 2i)(1 + 7i) ← expand factors using FOIL
= 4 + 28i - 2i - 14i²
= 4 + 26i + 14
= 18 + 26i → B
3 * (x^2) = 15x
3x^2 -15x = 0
x= - -15 +- sq root (225 -4*3*0) / 2*3
x = [15 +-sq root (225 -4*3*0] / 6
x1 = [15 +15] / 6
x1 = 5
x2 = [15 -15] / 6
x2 = 0
The number is 5
Check
3 * 5^2 = 15 * 5
75 = 75