Make up Lesson 15: Solving Quadratics (Deltamath)

Which of the following is standard form of a quadratic function?

Which of the following is factored form of a quadratic function?

Which of the following quadratic equations has a POSITIVE parabola as a graph?Select all that apply.

Tags

CCSS.HSF-IF.C.7A

Which of the following quadratic equations has a NEGATIVE parabola as a graph?Select all that apply.

Tags

CCSS.HSF-IF.C.7A

What are the steps for solving for x?

• On both sides of the equation first subtract six, then divide by three, and finally subtract one.

• On both sides of the equation first divide by 3, then subtract six, and finally subtract one.

• On both sides of the equation first subtract one, then subtract six, and finally divide by three.

Tags

CCSS.7.EE.B.4A

• -2(x-1)+5=-9

  -2(x-1)=-14
  x-1=7
  x=8

• -2(x-1)+5=-9
  

  -2(x-1)=-13
  x-1=11
  x=12

Tags

CCSS.7.EE.B.4A

Where did i make the first mistake when solving for x?

step(1) -7=-2(x+5)-1
step(2) -6=-2((x+5)
step(3) -4=x+5
step(4) -9=x 

• step 3

• step 1

• step 2

• step 4

Tags

CCSS.HSA.REI.A.1

Factor

y= 3x² - 4x - 7

• y=(3x-7)(x+1)

• y=3(x-7)(x-1)

• y=(3x+1)(x-9)

• y=(3x+1)(x-10)

Factor:

4x²-16x-9

• factors: (2x - 9)(2x + 1)

  zeros: x = 9/2 and x = - 1/2

• factors: (2x - 9)(2x + 1)

  zeros: x = - 9/2 and x = 1/2

• Apply the x-method and remember to divide by 4x when applying x-method.

Tags

CCSS.HSA-REI.B.4B