# How Would I Simplify (-r+s)(-r-s)?

**Answer:**

Rules

(-)(-) = +

(-)(+) = -

(+)(-) = -

(+)(+) = +

(-r+s)(-r-s)

Solving the brackets you will get

= (-r)(-r) + (-r)(-s) +(s)(-r) + (s)(-s)

Applying the above mentioned rules

= r^2 + rs - rs - s^2

= r^2 - s^2 >>answer

Or simply you can also apply formula

(a+b)(a-b) = (a^2 -b^2)

(-r+s)(-r-s) = r^2 - s^2

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