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Big Ideas Math: Modeling Real Life, Grade 8

BI

Big Ideas Math: Modeling Real Life, Grade 8 View details

1. Finding Square Roots

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Exercise 8 Page 375

Think of a number that when raised to the second power results in 425.

- 25 and 25

Practice makes perfect

We want to find both square roots of 425. ± sqrt(4/25)We need to think of a number that when raised to the second power results in 425. We can see that this number is 25.

(2/5)^2

(a/b)^m=a^m/b^m

2^2/5^2

Calculate power

4/25 ✓

With this information, we can say that the square roots of 425 are ± 25, which can be also written as - 25 and 25. ± sqrt(4/25) = ± 2/5

Subchapter links

Try It p.374-376

Self-Assessment for Concepts & Skills p.376

Self-Assessment for Problem Solving p.377

Review & Refresh p.378

Concepts, Skills, & Problem Solving p.378-380