Illustrative Math - Algebra 1 - Unit 7 - Lesson 19
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Clare is deriving the quadratic formula by solving (2ax+b)^{2}=b^{2}-4ac by completing the square.
She arrived at this equation. ax^{2}+bx+x=0
Briefly describe what she needs to do to finish solving for x and then show the steps.
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Tyler is solving the quadratic equation x^{2}+8x+11=4.
Study his work and explain the mistake he made. Then, solve the equation correctly.
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This lesson is from Illustrative Mathematics. Algebra 1, Unit 7, Lesson 19. Internet. Available from https://curriculum.illustrativemathematics.org/HS/teachers/1/7/19/index.html ; accessed 26/July/2021.
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