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Core Connections Algebra 2, 2013

CC

Core Connections Algebra 2, 2013 View details

3. Section 8.3

Finish the assignment

Continue to next subchapter

Exercise 173 Page 428

Substitute x=-2 into the given equation and then evaluate.

It is not. See solution.

Practice makes perfect

We can determine whether x=-2 is a solution by substituting it into the equation and simplifying using the order of operations.

x^4-4x = 8x^2-40

x= -2

( -2)^4-4( -2) ? = 8( -2)^2-40

▼

Evaluate

Calculate power

16 - 4(-2) ? = 8(4) - 40

MultNegNegOnePar

- a(- b)=a* b

16 + 8 ? = 8(4) - 40

Multiply

16 + 8 ? = 32 - 40

Add and subtract terms

24 ≠ -8 *

Since the sides are not equal, x = -2 is not a solution to the given equation.

Subchapter links

8.3.1 Polynomial Division p.411-413

8.3.2 Factors and Integral Roots p.419-424

8.3.3 An Application of Polynomials p.427-429