(c)(x + 2y -1)(x + y - 1)
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Answer:
x^2+2y^2+1+3xy-2x-3y
Step-by-step explanation:
=x^2+2y^2+1+xy-x+2xy-2y-x-y
=x^2+2y^2+1+3xy-2x-3y
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