Solve the system 2x — бу = 9, — 3х + 9 = — 15.
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ANSWER
EXPLANATION
The given product is
This is always equal to
The identity
is called difference of two squares.
We can verify this by simply expanding the brackets using the distributive property to obtain,
This simplifies to
EXPLANATION
The given product is
This is always equal to
The identity
is called difference of two squares.
We can verify this by simply expanding the brackets using the distributive property to obtain,
This simplifies to