Solve 4a^2-256 - ScanMath

Evaluate

4 a^{2} - 256

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

4 a^{2} - 256 = 0

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

4 a^{2} = 0 + 256

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

4 a^{2} = 256

Divide both sides

\frac{4 a ^{2}}{4} = \frac{256}{4}

Divide the numbers

a^{2} = \frac{256}{4}

Divide the numbers

More Steps

a^{2} = 64

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

a = \pm 64

Simplify the expression

More Steps

a = \pm 8

Separate the equation into 2 possible cases

a = 8 a = - 8

Solution

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

Factor the expression