Precalculus Complex Zeros Rational Functions

What is another way to say "where a function crosses the x-axis"?

• x-intercept

• zero

• root

• all of these.

Tags

CCSS.HSF-IF.C.7C

One zero of 2x³-13x²+36 is 2.
What is another zero?

• 3/2

• 6

• 2

• -6

Find all zeros for the polynomial function P(x) = x³ -3x²-5x+15

• 3, √5 

• 3, √5, -√5

• -3, √5, -√5

• -3, 5i, -5i

The degree of the polynomial determines the max number of roots.

• True

• False

How could you determine    if x-2 is a factor of 2x³-5x²+x-2?

• Use synthetic division and see if the quotient is even

• Ask the person sitting next to me

• Use synthetic division and see if the remainder is zero

• Flip a coin

Tags

CCSS.HSA.APR.D.6

• 3
• -3
• 3i
• -3i

Tags

CCSS.HSN.CN.B.4

• 5
• -5
• 5i
• -5i

Tags

CCSS.HSN.CN.A.1

• 5
• -5
• 5i
• -5i

Tags

CCSS.HSN.CN.A.1

Q1. What is the result of the following expression: 7 + 4i?

• A) 7 + 4i

• B) 4 + 7i

• C) 7 - 4i

• D) -4 + 7i

Tags

CCSS.HSN.CN.B.4

• -2 + i
• 2 + i
• 1 - 2i
• 1 + 2i

Tags

CCSS.HSN.CN.B.4