A square can be both a rectangle and a rhombus
Answer:

Step-by-step explanation:
<u>Step 1: Set x to -1 and solve</u>
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Answer: 
Answer:
(-1,1)
Step-by-step explanation:
8xy-7xy-3xy-3y²-2y²+8y²+5x²+12x²
then simplify by combining like terms -2xy+3y²+17x²