Solve Quadratics Review

Solve by factoring.

x² + 7x + 12 = 0

• ( x + 4 ) ( x + 3 )

• x = 4 and x = 3

• x = -12 / 7

• x = - 4 and x = - 3

Solve by factoring.

x² + 3x = 10

• x² + 3x - 10 = 0

• ( x + 5 ) ( x - 2 )

• { - 5, 2 }

• { -2, 5 }

Solve by square roots (SADMEP)
x² - 64 = 0

• 64
• 8
• 8 or -8
• 1 or -64

Tags

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.4

• A
• B
• C
• D

What should you do first in solving this equation?
x² + 6x - 13 = 3

• Get factored form
• Write down: a=1, b=6, c=-13
• Make it equal 0 by subtracting 3 on each side
• Type it all in a calculator.

The discriminant is

• ax² + bx + c

• b - 4ac

• b² - 4ac

• b² + 4ac

If the discriminant equals 0, then the quadratic has:

• 1 Rational Solution

• 2 Rational Solutions

• No solutions

• 2 Complex Solutions

Factor: x² – 5x – 24

• (x - 5)(x + 19)
• (x - 8)(x + 3)
• (x - 3)(x + 8)
• (x - 19)(x + 5)

What are the solutions?

• 0 and 8
• -2 and -4
• 3 and -1
• 2 and 4

How many solutions are there if the discriminant is positive.

• 0
• 1
• 2
• Infinite