I some problems that I need help with please.
Add or subtact as indicated and write the results in standard form.
4. 6-(-5+7i)-(7-2i)
Divide and express the result in standard form. --These problems I don't understand, do you have to multply the denominator by the numerator?
7. (6-3i)/(9+2i)
8. (3-3i)/ (5-3i)
Perform the indicated operations and write the result in standard form.
17. (-4 - square root of -36)^2 I got -20+48i
19. ( square root of -16)(square root of -4) This one I don't understand.
25. (-42 + square root of -180)/6 this one I don't understand.
6-(-5+7i)-(7-2i) =
6 + 5 - 7i - 7 + 2i =
4 - 5 i
(6-3i)/(9+2i) =
(6-3i)(9-2i)/[(9+2i)(9-2i)]
(9-2i)(9+2i) = 81 + 4 = 85
(6-3i)(9-2i) = 54 -6 - 12i - 27i =
48 - 39 i
(-4 - square root of -36)^2 =
(-4 - 6 i)^2 =
(4+6i)^2 =
16 - 36 + 48 i = -20 + 48 i
( square root of -16)(square root of -4) =
4 i * 2i = -8
2 answers
-3(2+-5)
-9=x+6(square root of -1)
-9=x+-6
-9+-6=x
-15=x
1 answer