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8th Grade Quadratic and Cubic Equations Slides

8th Grade Quadratic and Cubic Equations Slides preview
8th Grade Quadratic and Cubic Equations Slides preview
8th Grade Quadratic and Cubic Equations Slides preview 2
8th Grade Quadratic and Cubic Equations Slides preview 3
8th Grade Quadratic and Cubic Equations Slides preview 4
8th Grade Quadratic and Cubic Equations Slides preview 5
8th Grade Quadratic and Cubic Equations Slides preview 6

Look Inside · 10 pages

Roots and equations slide deck cover, with the standard code CCSS.MATH.CONTENT.8.EE.A.2 below the title
Title slide of the 10-slide presentation
Slide solving x²=16: 4 · 4 and (-4) · (-4) both equal 16, so the solutions are written x = ±4
Slide 2: first square root example
Slide solving x²=20: no whole number fits, so the solutions are √20 and -√20, each squaring to 20
Slide 3: square root of a non-perfect square
Continuation of the x²=20 example: a note on the brackets and the short-form solution x = ±√20
Slide 4: second part of the x²=20 example
Irrational square roots slide: an integer that is not a perfect square has an irrational root, as in √2, √3, √5
Slide 5: irrational square roots
Slide on x² = -4: there is no real number solution, because a negative times a negative is positive
Slide 6: a square equal to a negative number
Slide solving x² = 25/16 with the rule √(a/b) = √a/√b, giving 5/4, checked by (5/4)² = 25/16
Slide 7: square root of a fraction
Slide solving x³ = 8: 2³ = 8, but (-2)³ = -8, so x = 2 is the only solution
Slide 8: first cube equation example
Slide solving x³ = 10: no whole number fits, so the exact solution is the cube root of 10, about 2.15443
Slide 9: cube root of a non-perfect cube
Slide on x³ = -27: unlike square roots, cube roots of negatives exist, so x = -3; for x³ = -7, x = -∛7
Slide 10: cube roots of negative numbers
Attributes
Subject

Math, Algebra

Grades

Grade 8

Types

Presentations, Teacher Tools

File

Microsoft PowerPoint

Editable
Yes
Author
TheBrightestKid
Rating
Add To Collection
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About This Product

This PowerPoint explains how to solve quadratic and cubic equations at 8th grade level. 8.EE.A.2.

What's Included

1 PPT 15 slides.

Resource Tags

Quadratic equations Cubic Equations Roots

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