Step-by-step explanation:
(2x-y+3)(2x-y-3)=
4x²-2xy-6x-2xy+y²+3y+6x-3y-9=
4x²-4xy+y²-9=
(2x-y)²-9
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Answer:
x = -21/5 = -4.200
Step-by-step explanation:
Answer:
<h2>
YOUR CORRECT ANSWER'S (D.)</h2>
Step-by-step explanation: