Completing the square and quadratic formula

Determine the values of

a, b, and c for

the quadratic equation:

4x² – 8x = 3

• a = 4, b = -8, c = 3

• a = 4, b =-8, c =-3

• a = 4, b = 8, c = 3

• a = 4, b = 8, c = -3

• A

• B

• C

• D

What is "b" in the equation 3x² −7 = 0 ?

• 3

• 7

• 0

• 10

Solve    2x² + 7x - 15 = 0

• -1.5 or 5
• No Solution
• -5 or 1.5
• 0.7 or 5

Tags

CCSS.HSA-REI.B.4B

• A
• B
• C
• D

Tags

CCSS.HSA-REI.B.4B

2x² + 2x = 6

• No Solution
• -3/2, ½
• -2.30, 1.30
• -3.65, 1.65

Is this a perfect square trinomial?
x² - 20x + 100

• (x+10)²
• (x-10)²
• (x+20)²
• (x+10)(x-10)

Tags

CCSS.HSA.APR.C.5

CCSS.HSA.SSE.B.3

What value of c would make this a perfect sqaure trinomial?
x² +8x + c

• 4
• 16
• 64
• -16

Tags

CCSS.HSA-REI.B.4B

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

When factoring
x² - 4x + 4 = 20,
what goes in the blank?
(x - __ )² = 20

• 4
• 2
• 8
• 20