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b)(2x-3)(2x-3)=4x²-6x-6x+9=4x²-12x+9
c)(4-2m)(4-2m)=16-8m-8m+4m²=16-16m+4m²
d)(3a-b)(3a-b)=9a²-6ab+b²
e)(ax-5a)(ax-5a)=a²x²-10a²x+25a²
f)(x²-2)(x²-2)=x(do czwartej)-4x²+4
g)(√2-5)(√2-5)=2-10√2+25
h)(2-√3)(2-√3)=4-4√3+3
i)(√32-√2)(√32-√2)=32+2=34