2.09 The Quadratic Formula

Presentation

•

Mathematics

•

9th - 12th Grade

•

Hard

•

CCSS

HSA-REI.B.4B, HSN.CN.C.7

Standards-aligned

Amanda Furtado

Used 4+ times

FREE Resource

6 Slides • 11 Questions

2.09 The Quadratic Formula

Day 1

Lesson Agenda

Do Now - slide 2 (3 min)
Edgenuity Warm-Up (8 min)
Lesson Objectives - slide 5 (2 min)
Edgenuity Instruction (30 min)
Exit Ticket (2 min)

Multiple Choice

Simplify

x\ =\ \frac{5+\sqrt{-49}}{6}

$-\frac{1}{3}i$

$2i$

$\frac{5}{6}+\frac{7}{6}i$

$\frac{5}{6}-\frac{7}{6}i$

Solutions and Intercepts

The parabola has ___ x-intercepts, representing the times when the ball’s height above the ground is ___ feet.

There are _____ solutions to this equation, representing the number of seconds elapsed between the ball leaving the group and hitting the ground again.

Fill in the Blanks

The parabola has

Type answer...

x-intercepts.

Fill in the Blanks

The x-intercepts represent the times when the ball’s height above the ground is

Type answer...

feet.

Fill in the Blanks

There are

Type answer...

solutions to this equation, representing the number of seconds elapsed between the ball leaving the group and hitting the ground again.

Edgenuity Video

Slide 2

Notes

Using the Quadratic Formula

Open Ended

Given

y=\left(2x+3\right)^2

, identify the standard form of the quadratic equation.

Type response here

Open Ended

Given $0=4x^2+12x+9$ , what are a, b, and c?

Type response here

Open Ended

Given $a=4,\ b=12,\ c=9$ .

Substitute into the quadratic formula.

$x=\frac{-b+-\sqrt{b^2-4ac}}{2a}$

Type response here

Fill in the Blanks

The solution to $0=4x^2+12x+9$ is

Type answer...

Edgenuity Video

Slide 6

Multiple Choice

There are two real solutions if the radicand is ___.

Less than zero

Zero

Greater than zero

Multiple Choice

There is one real solution if the radicand is ___.

Less than zero

Zero

Greater than zero

Multiple Choice

There are zero real solutions (two complex solutions) if the radicand is ___.

Less than zero

Zero

Greater than zero

2.09 The Quadratic Formula

Day 1

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