Answer:
a. x²-1
b. x²+x-6
c. x²-4x+4
Explanation:
a. (x+1)(x-1)
x²-x+x-1
x²-1
b. (x-2)(x+3)
x²+3x-2x-6
x²+x-6
c. (x-2)²
(x-2)(x-2)
x²-2x-2x+4
x²-4x+4
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