1.(x+y)²
2.(a+6)²
3.(x-5)(x+5)
4.(ab-1)(ab+1)
5.(1-с)²
6.(b+8)²
7.(50-x)(50+x)
8.(0.7-4x)(0.7+4x).
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1.(x+y)²
2.(a+6)²
3.(x-5)(x+5)
4.(ab-1)(ab+1)
5.(1-с)²
6.(b+8)²
7.(50-x)(50+x)
8.(0.7-4x)(0.7+4x).