-4\div 1/2

Solution

- 4 \div \frac{1}{2}

- 8

Solution steps

- 4 \div \frac{1}{2}

Convert element to fraction:

4 = \frac{4}{1}

= - \frac{4}{1} \div \frac{1}{2}

Apply the fraction rule:

\frac{a}{b} \div \frac{c}{d} = \frac{a}{b} \times \frac{d}{c}

= - \frac{4}{1} \times \frac{2}{1}

Apply rule

\frac{a}{1} = a

= - 4 \times 2

Multiply the numbers:

4 \times 2 = 8

= - 8

\frac{200}{20}

(2 x - 1) (x + 4) - (2 x - 1) (3 x + 1)

5 (3 x + 7)

28 - 318 + 432