unit-1 test - 2/21/2022

• 10
• -10
• 10i
• -10i

What does i² = ?

• -1
• √-1
• 1
• -√1

Multiply: 
(4 – 3i)(7 + 2i)

• A.  22 - 13i
• B.  28 - 19i
• C.  34 - 13i
• D.  -34 - 29i

Simplify: (8 + 2i) + ( -2 - 3i)

• 10 - i

• 10 + 5i

• 6 + 5i

• 6 - i

• 7²
• 7^1/2
• 7^-2
• 7^-1/2

What can the roots to a quadratic equation be called?

• zeros

• solutions

• x-intercepts

• none of the choices

Say 'TRUE' or 'FALSE'
Every Quadratic equation has exactly one root

• TRUE
• FALSE

Say 'TRUE' or 'FALSE'
A quadratic equation ax² + bx + c = 0 has equal roots, then b² - 4ac = 0 

• TRUE
• FALSE

Solve for the values of x:
(x + 2)(x - 3) = 0

• { 2, 3 }
• { -2, -3 }
• { 2, 3 }
• { -2, 3 }