Solve -2a-15-2a-15

Question

Simplify the expression

- 4 a - 30

Evaluate

- 2 a - 15 - 2 a - 15

Subtract the terms

More Steps

Evaluate

- 2 a - 2 a

Collect like terms by calculating the sum or difference of their coefficients

(- 2 - 2) a

Subtract the numbers

- 4 a

- 4 a - 15 - 15

Solution

- 4 a - 30

Show Solution

- 2 (2 a + 15)

Evaluate

- 2 a - 15 - 2 a - 15

Subtract the terms

More Steps

Simplify

- 2 a - 15 - 2 a

Subtract the terms

More Steps

Evaluate

- 2 a - 2 a

Collect like terms by calculating the sum or difference of their coefficients

(- 2 - 2) a

Subtract the numbers

- 4 a

- 4 a - 15

- 4 a - 15 - 15

Subtract the numbers

- 4 a - 30

Solution

- 2 (2 a + 15)

Show Solution

a = - \frac{15}{2}

Alternative Form

a = - 7.5

Evaluate

- 2 a - 15 - 2 a - 15

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

- 2 a - 15 - 2 a - 15 = 0

Subtract the terms

More Steps

Simplify

- 2 a - 15 - 2 a

Subtract the terms

More Steps

Evaluate

- 2 a - 2 a

Collect like terms by calculating the sum or difference of their coefficients

(- 2 - 2) a

Subtract the numbers

- 4 a

- 4 a - 15

- 4 a - 15 - 15 = 0

Subtract the numbers

- 4 a - 30 = 0

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

- 4 a = 0 + 30

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

- 4 a = 30

Change the signs on both sides of the equation

4 a = - 30

Divide both sides

\frac{4 a}{4} = \frac{- 30}{4}

Divide the numbers

a = \frac{- 30}{4}

Solution

More Steps

Evaluate

\frac{- 30}{4}

Cancel out the common factor 2

\frac{- 15}{2}

Use \frac{- a}{b} = \frac{a}{- b} = - \frac{a}{b} to rewrite the fraction

- \frac{15}{2}

a = - \frac{15}{2}

Alternative Form

a = - 7.5

Show Solution