Solve 8f^35-30 - ScanMath

Question

Simplify the expression

40 f^{3} - 30

Evaluate

8 f^{3} \times 5 - 30

Solution

40 f^{3} - 30

Show Solution

10 (4 f^{3} - 3)

Evaluate

8 f^{3} \times 5 - 30

Multiply the terms

40 f^{3} - 30

Solution

10 (4 f^{3} - 3)

Show Solution

f = \frac{3 6}{2}

Alternative Form

f \approx 0.90856

Evaluate

8 f^{3} \times 5 - 30

To find the roots of the expression,set the expression equal to 0

8 f^{3} \times 5 - 30 = 0

Multiply the terms

40 f^{3} - 30 = 0

Move the constant to the right-hand side and change its sign

40 f^{3} = 0 + 30

Removing 0 doesn't change the value,so remove it from the expression

40 f^{3} = 30

Divide both sides

\frac{40 f ^{3}}{40} = \frac{30}{40}

Divide the numbers

f^{3} = \frac{30}{40}

Cancel out the common factor 10

f^{3} = \frac{3}{4}

Take the 3 -th root on both sides of the equation

3 f^{3} = 3 \frac{3}{4}

Calculate

f = 3 \frac{3}{4}

Solution

More Steps

Evaluate

3 \frac{3}{4}

To take a root of a fraction,take the root of the numerator and denominator separately

\frac{3 3}{3 4}

Multiply by the Conjugate

\frac{3 3 \times 3 4 ^{2}}{3 4 \times 3 4 ^{2}}

Simplify

\frac{3 3 \times 2 3 2}{3 4 \times 3 4 ^{2}}

Multiply the numbers

More Steps

Evaluate

33 \times 232

Multiply the terms

36 \times 2

Use the commutative property to reorder the terms

236

\frac{2 3 6}{3 4 \times 3 4 ^{2}}

Multiply the numbers

More Steps

Evaluate

34 \times 3 4^{2}

The product of roots with the same index is equal to the root of the product

3 4 \times 4^{2}

Calculate the product

3 4^{3}

Transform the expression

3 2^{6}

Reduce the index of the radical and exponent with 3

2^{2}

\frac{2 3 6}{2 ^{2}}

Reduce the fraction

More Steps

Evaluate

\frac{2}{2 ^{2}}

Use the product rule \frac{a ^{n}}{a ^{m}} = a^{n - m} to simplify the expression

\frac{1}{2 ^{2 - 1}}

Subtract the terms

\frac{1}{2 ^{1}}

Simplify

\frac{1}{2}

\frac{3 6}{2}

f = \frac{3 6}{2}

Alternative Form

f \approx 0.90856

Show Solution