Solve 640-10x^2 - ScanMath

Evaluate

640 - 10 x^{2}

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

640 - 10 x^{2} = 0

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

- 10 x^{2} = 0 - 640

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

- 10 x^{2} = - 640

Change the signs on both sides of the equation

10 x^{2} = 640

Divide both sides

\frac{10 x ^{2}}{10} = \frac{640}{10}

Divide the numbers

x^{2} = \frac{640}{10}

Divide the numbers

More Steps

x^{2} = 64

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

x = \pm 64

Simplify the expression

More Steps

x = \pm 8

Separate the equation into 2 possible cases

x = 8 x = - 8

Solution

x_{1} = - 8, x_{2} = 8

Factor the expression