How do you simplify $(-9)(-7)+(-9)(7) - (9)(-7)$ ?

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Answer 1 · 2015-10-28T22:57:28

$(-9)(-7)+(-9)(7)-(9)(-7)=63$

$(-9)(-7)+(-9)(7)-(9)(-7)$

Multiply the pairs of terms.

$63-63+63=63$

How do you simplify (-9)(-7)+(-9)(7) - (9)(-7)(-9)(-7)+(-9)(7) - (9)(-7)?