U4 Exploring Polynomial Functions CFA #4

What is the complex conjugate of 20 – 9i?

• –20 + 9i

• 20 + 9i

• –20 – 9i

• 20 – 9i

Tags

CCSS.HSN.CN.A.3

The real part in this complex number –2i is

• 2

• -2

• –2i

• 0

• i

Tags

CCSS.HSN.CN.A.1

Simplify (3 + 2i)(2 – 3i).

• –5i

• 12 – 5i

• 7

• 6 – 9i

Tags

CCSS.HSN.CN.A.2

• –8

• 8i

• 8

• –8i

Tags

CCSS.HSN.CN.A.3

What does the imaginary number i represent?

• –1

• √–1

• –√–1

• –√1

Tags

CCSS.HSN.CN.A.1

Which of these expressions is equal to 4 - 7i?

• (6 - i) - (2 - 8i)

• (6 + i) - (2 + 8i)

• (6 + i) + (2 + 8i)

• (6 - i) + (2 - 8i)

Tags

CCSS.HSN.CN.A.2

Write an equivalent expression for (x + y)(x - y).

Tags

CCSS.HSA.APR.C.4

• (x - y)(x - y)

Tags

CCSS.HSA.APR.C.4

• 3

• 4

• 5

• 6

• 3, 2 + i