Solve [a-z][a-z][0-9]

Evaluate

(a - z) (a - z) (0 - 9)

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

(a - z) (a - z) (- 9)

Multiply the first two terms

(a - z)^{2} (- 9)

Use the commutative property to reorder the terms

- 9 (a - z)^{2}

Use (a - b)^{2} = a^{2} - 2 ab + b^{2} to expand the expression

- 9 (a^{2} - 2 a z + z^{2})

Apply the distributive property

- 9 a^{2} - (- 9 \times 2 a z) - 9 z^{2}

Multiply the numbers

- 9 a^{2} - (- 18 a z) - 9 z^{2}

Solution

- 9 a^{2} + 18 a z - 9 z^{2}

Simplify the expression