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Questions

1 / 10

Time

Score

Properties Of Complex Numbers

Fill in the blank:
If $z=2+3i$ , then z+z =__________.

$2$

$3$

$4$

Fill in the blank:
If z =-z then z is ____________.

pure imaginary

pure real

natural

Fill in the blank:
If $z=5+3i$ , then z-z =____________.

$10$

$6i$

$6$

Fill in the blank:
If $z=a+bi$ , then zz =____________.

$2a^2+b^2$

$a^2-b^2$

$a^2+b^2$

Fill in the blank:
If $z=a+bi$ , then z+z =__________.

$2a$

$2b$

$b$

Is the number sentence true or false?
|z| = |z|

True

False

Fill in the blank:
If $z=-5+i$ , then z+z =____________.

$4$

$-2i$

$-10$

Fill in the blank:
If $z=-8+i$ , then z z =____________.

$65$

$61$

$16$

If $z=2+3i$ , then z =____________.
=

$2+3i$

$2-3i$

$-2-3i$

Fill in the blank:
If z₁=a+bi, z₂=c+di, then (a+bi)(c+di) =__________.

(a+bi)-(c+di)

(a+bi)+(c+di)

(a+bi).(c+di)

Questions

Time

Score

Properties Of Complex Numbers

Fill in the blank:If ﻿z=2+3iz=2+3iz=2+3i﻿, then z+z =__________.

﻿222﻿

﻿333﻿

﻿444﻿

Fill in the blank:If z =-z then z is ____________.

pure imaginary

pure real

natural

Fill in the blank:If ﻿z=5+3iz=5+3iz=5+3i﻿, then z-z =____________.

﻿101010﻿

﻿6i6i6i﻿

﻿666﻿

Fill in the blank:If ﻿z=a+biz=a+biz=a+bi﻿, then zz =____________.

﻿2a2+b22a^2+b^22a2+b2﻿

﻿a2−b2a^2-b^2a2−b2﻿

﻿a2+b2a^2+b^2a2+b2﻿

Fill in the blank:If ﻿z=a+biz=a+biz=a+bi﻿, then z+z =__________.

﻿2a2a2a﻿

﻿2b2b2b﻿

﻿bbb﻿

Is the number sentence true or false?|z| = |z|

True

False

Fill in the blank:If ﻿z=−5+iz=-5+iz=−5+i﻿, then z+z =____________.

﻿444﻿

﻿−2i-2i−2i﻿

﻿−10-10−10﻿

Fill in the blank:If ﻿z=−8+iz=-8+iz=−8+i﻿, then z z =____________.

﻿656565﻿

﻿616161﻿

﻿161616﻿

If ﻿z=2+3iz=2+3iz=2+3i﻿, then z =____________. =

﻿2+3i2+3i2+3i﻿

﻿2−3i2-3i2−3i﻿

﻿−2−3i-2-3i−2−3i﻿

Fill in the blank:If z1=a+bi, z2=c+di, then (a+bi)(c+di) =__________.

(a+bi)-(c+di)

(a+bi)+(c+di)

(a+bi).(c+di)

Incorrect

Great!

Fill in the blank:
If $z=2+3i$ , then z+z =__________.

$2$

$3$

$4$

Fill in the blank:
If z =-z then z is ____________.

Fill in the blank:
If $z=5+3i$ , then z-z =____________.

$10$

$6i$

$6$

Fill in the blank:
If $z=a+bi$ , then zz =____________.

$2a^2+b^2$

$a^2-b^2$

$a^2+b^2$

Fill in the blank:
If $z=a+bi$ , then z+z =__________.

$2a$

$2b$

$b$

Is the number sentence true or false?
|z| = |z|

Fill in the blank:
If $z=-5+i$ , then z+z =____________.

$4$

$-2i$

$-10$

Fill in the blank:
If $z=-8+i$ , then z z =____________.

$65$

$61$

$16$

If $z=2+3i$ , then z =____________.
=

$2+3i$

$2-3i$

$-2-3i$

Fill in the blank:
If z₁=a+bi, z₂=c+di, then (a+bi)(c+di) =__________.