Complex Number: multiply & divide

Give your answer in the form of a+bi for (8-3i)(5-2i)

• 13 - 5i

• 34 - 31i

• -31 + 34i

• 5 -13i

Solve 5( - 6 + 4i)

• -30 - 20i

• -20 +30i

• 30 + 20i

• -30 + 20i

If z₁ = 2 + 5i and z₂ = 3 - 2i, determine z₁x z₂.

• -11i +16

• 16 - 11i

• 16 + 11i

• -16 -11i

What is the conjugate of 2 - 7i ?

• 7 + 2i

• 2 + 7i

• -2 - 7i

• -2 + 7i

Tags

CCSS.HSN.CN.A.3

Refer to the above image, what is the conjugate of the denominator?

• -1 + 5i

• 1 - 5i

• 1 + 5i

• -1 - 5i

Tags

CCSS.HSA.APR.D.6

Refer to the above image, what is the conjugate of the denominator?

• 8 + 6i

• 6 + 8i

• 6 - 8i

• -6 +8i

Tags

CCSS.HSA.APR.A.1

If z₁ = 2 + 5i and z₂ = 4 - i, determine z₁/z₂

• 3/17 + 22i/17

• 22/17 + 3i/17

• 3/17 + 22/17i

• 3/17 - 22i/17

Solve the above complex number in the form of a+bi

• 4/5 + (7/5)i

• -4/5 - (7/5)i

• -4/5 - 7/5i

• 4/5 - (7/5)i

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

CCSS.HSN.CN.B.4

CCSS.HSN.CN.B.5

Solve (-3-5i)(2-6i)

• 36 + 8i

• 36 + 8i²

• -36 - 8i

• -36 + 8i