Solve x^2-18x^65 - ScanMath

Question

Simplify the expression

x^{2} - 90 x^{6}

Evaluate

x^{2} - 18 x^{6} \times 5

Solution

x^{2} - 90 x^{6}

Show Solution

x^{2} (1 - 90 x^{4})

Evaluate

x^{2} - 18 x^{6} \times 5

Multiply the terms

x^{2} - 90 x^{6}

Rewrite the expression

x^{2} - x^{2} \times 90 x^{4}

Solution

x^{2} (1 - 90 x^{4})

Show Solution

x_{1} = - \frac{4 9 0 ^{3}}{90}, x_{2} = 0, x_{3} = \frac{4 9 0 ^{3}}{90}

Alternative Form

x_{1} \approx - 0.324668, x_{2} = 0, x_{3} \approx 0.324668

Evaluate

x^{2} - 18 x^{6} \times 5

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

x^{2} - 18 x^{6} \times 5 = 0

Multiply the terms

x^{2} - 90 x^{6} = 0

Factor the expression

x^{2} (1 - 90 x^{4}) = 0

Separate the equation into 2 possible cases

x^{2} = 0 1 - 90 x^{4} = 0

The only way a power can be 0 is when the base equals 0

x = 0 1 - 90 x^{4} = 0

Solve the equation

More Steps

Evaluate

1 - 90 x^{4} = 0

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

- 90 x^{4} = 0 - 1

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

- 90 x^{4} = - 1

Change the signs on both sides of the equation

90 x^{4} = 1

Divide both sides

\frac{90 x ^{4}}{90} = \frac{1}{90}

Divide the numbers

x^{4} = \frac{1}{90}

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

x = \pm 4 \frac{1}{90}

Simplify the expression

More Steps

Evaluate

4 \frac{1}{90}

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

\frac{4 1}{4 90}

Simplify the radical expression

\frac{1}{4 90}

Multiply by the Conjugate

\frac{4 9 0 ^{3}}{4 90 \times 4 9 0 ^{3}}

Multiply the numbers

\frac{4 9 0 ^{3}}{90}

x = \pm \frac{4 9 0 ^{3}}{90}

Separate the equation into 2 possible cases

x = \frac{4 9 0 ^{3}}{90} x = - \frac{4 9 0 ^{3}}{90}

x = 0 x = \frac{4 9 0 ^{3}}{90} x = - \frac{4 9 0 ^{3}}{90}

Solution

x_{1} = - \frac{4 9 0 ^{3}}{90}, x_{2} = 0, x_{3} = \frac{4 9 0 ^{3}}{90}

Alternative Form

x_{1} \approx - 0.324668, x_{2} = 0, x_{3} \approx 0.324668

Show Solution