Solve 8x^6-220 - ScanMath

Question

Factor the expression

4 (2 x^{6} - 55)

Evaluate

8 x^{6} - 220

Solution

4 (2 x^{6} - 55)

Show Solution

x_{1} = - \frac{6 1760}{2}, x_{2} = \frac{6 1760}{2}

Alternative Form

x_{1} \approx - 1.737356, x_{2} \approx 1.737356

Evaluate

8 x^{6} - 220

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

8 x^{6} - 220 = 0

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

8 x^{6} = 0 + 220

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

8 x^{6} = 220

Divide both sides

\frac{8 x ^{6}}{8} = \frac{220}{8}

Divide the numbers

x^{6} = \frac{220}{8}

Cancel out the common factor 4

x^{6} = \frac{55}{2}

Take the root of both sides of the equation and remember to use both positive and negative roots

x = \pm 6 \frac{55}{2}

Simplify the expression

More Steps

Evaluate

6 \frac{55}{2}

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

\frac{6 55}{6 2}

Multiply by the Conjugate

\frac{6 55 \times 6 2 ^{5}}{6 2 \times 6 2 ^{5}}

Simplify

\frac{6 55 \times 6 32}{6 2 \times 6 2 ^{5}}

Multiply the numbers

More Steps

Evaluate

655 \times 632

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

6 55 \times 32

Calculate the product

61760

\frac{6 1760}{6 2 \times 6 2 ^{5}}

Multiply the numbers

More Steps

Evaluate

62 \times 6 2^{5}

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

6 2 \times 2^{5}

Calculate the product

6 2^{6}

Reduce the index of the radical and exponent with 6

2

\frac{6 1760}{2}

x = \pm \frac{6 1760}{2}

Separate the equation into 2 possible cases

x = \frac{6 1760}{2} x = - \frac{6 1760}{2}

Solution

x_{1} = - \frac{6 1760}{2}, x_{2} = \frac{6 1760}{2}

Alternative Form

x_{1} \approx - 1.737356, x_{2} \approx 1.737356

Show Solution