Quadratics

What is the standard form for a Quadratic?

• ax²+ bx = - c
• x = -b ± √(b²-4ac) / 2a
• ax² + bx + c
• y = mx + b

What is the greatest number of solutions that a Quadratic Equation can have?

• 0
• 1
• 2
• 3

Tags

CCSS.HSA-REI.B.4B

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.

What do you do to the b value to correctly complete the square?

• square it
• divide it by 2 and square the result
• divide it by 2 and take the square root of the result
• divide it by 2 only

Tags

CCSS.HSA-REI.B.4B

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.

Tags

CCSS.HSA-REI.B.4B

What is the vertex of the following:  
(x-2)² + 5 = f(x)

• (2,5)
• (-2,5)
• (2,-5)
• (-2,-5)

Solve by factoring:

x² + 13x + 40 = 0

• -8, 5

• -40, -1

• 5, 8

• -8, -5

Solve by factoring:

x² - 9x + 20 = 0

• x = -4 and x = -5

• x = 20 and x = -9

• x = 4 and x = 5

• x = -4 and x = 5

Solve by applying square roots:

2(x - 4)² = 200

• ±10

• -14, 6

• -6, 14

• 100

Solve by applying square roots:

(x + 1) ² = 25

• ± 5

• 4 or -6

• -4 or 6

• ± 4