Look at this equation: b^(3)=125 Solve for b. b=◻

Write 125 as a cube number: Write 125 as a cube number. 125 = 5 * 5 * 5 125 = 5^3Find cube root of 125: We know: 125 = 5^3 Find the value of root(3) (125). root(3) (125) = root(3) (5^3) Cube and cube root cancel each other out, root(3) (125) = 5

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Look at this equation:
b^(3)=125
Solve for b.

b=◻

Look at this equation: $\newline$ $b^{3}=125$ $\newline$ Solve for $b$ . $\newline$ $b=$ $\square$

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Math Problems

Grade 8

Solve equations using cube roots

Full solution

Q. Look at this equation:

\newline

b^{3}=125

\newline

Solve for

b

\newline

b=

\square

Write $125$ as a cube number: Write $125$ as a cube number. $\newline$ $125 = 5 \times 5 \times 5$ $\newline$ $125 = 5^3$
Find cube root of $125$ : We know: $125 = 5^3$ $\newline$ Find the value of $\sqrt[3]{125}$ . $\newline$ $\sqrt[3]{125} = \sqrt[3]{5^3}$ $\newline$ Cube and cube root cancel each other out, $\newline$ $\sqrt[3]{125} = 5$