Solve x^62x-5 - ScanMath

Question

Simplify the expression

2 x^{7} - 5

Evaluate

x^{6} \times 2 x - 5

Solution

More Steps

Evaluate

x^{6} \times 2 x

Multiply the terms with the same base by adding their exponents

x^{6 + 1} \times 2

Add the numbers

x^{7} \times 2

Use the commutative property to reorder the terms

2 x^{7}

2 x^{7} - 5

Show Solution

x = \frac{7 320}{2}

Alternative Form

x \approx 1.139852

Evaluate

x^{6} \times 2 x - 5

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

x^{6} \times 2 x - 5 = 0

Multiply

More Steps

Multiply the terms

x^{6} \times 2 x

Multiply the terms with the same base by adding their exponents

x^{6 + 1} \times 2

Add the numbers

x^{7} \times 2

Use the commutative property to reorder the terms

2 x^{7}

2 x^{7} - 5 = 0

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

2 x^{7} = 0 + 5

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

2 x^{7} = 5

Divide both sides

\frac{2 x ^{7}}{2} = \frac{5}{2}

Divide the numbers

x^{7} = \frac{5}{2}

Take the 7 -th root on both sides of the equation

7 x^{7} = 7 \frac{5}{2}

Calculate

x = 7 \frac{5}{2}

Solution

More Steps

Evaluate

7 \frac{5}{2}

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

\frac{7 5}{7 2}

Multiply by the Conjugate

\frac{7 5 \times 7 2 ^{6}}{7 2 \times 7 2 ^{6}}

Simplify

\frac{7 5 \times 7 64}{7 2 \times 7 2 ^{6}}

Multiply the numbers

More Steps

Evaluate

75 \times 764

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

7 5 \times 64

Calculate the product

7320

\frac{7 320}{7 2 \times 7 2 ^{6}}

Multiply the numbers

More Steps

Evaluate

72 \times 7 2^{6}

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

7 2 \times 2^{6}

Calculate the product

7 2^{7}

Reduce the index of the radical and exponent with 7

2

\frac{7 320}{2}

x = \frac{7 320}{2}

Alternative Form

x \approx 1.139852

Show Solution