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Pearson Algebra 1 Common Core, 2011
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Pearson Algebra 1 Common Core, 2011 View details
5. Completing the Square
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Exercise 64 Page 581

Substitute 2 for a, 5 for b and - 7 for c in the given expression.

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Practice makes perfect
To evaluate the given expression for a = 2, b = 5 and c = - 7, we should substitute these values into the expression and simplify as much as possible.
b^2 - 4ac
SubstituteValues

Substitute values

(5)^2 - 4(2)(- 7)
CalcPow

Calculate power

25 - 4(2)(- 7)
Multiply

Multiply

25 - 8(- 7)
MultNegNegOnePar

- a(- b)=a* b

25 + 56
AddTerms

Add terms

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Subchapter links expand_more
arrow_right Lesson Check p.579
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Lesson Check 6 (Page 579)
arrow_right Practice and Problem-Solving Exercises p.579-581
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Practice and Problem-Solving Exercises 32 (Page 580)
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Practice and Problem-Solving Exercises 48 (Page 581)
Practice and Problem-Solving Exercises 49 (Page 581)
arrow_right Standardized Test Prep p.581
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Standardized Test Prep 52 (Page 581)
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arrow_right Mixed Review p.581
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Mixed Review 64 (Page 581)
Mixed Review 65 (Page 581)
Mixed Review 66 (Page 581)