1.(m+n)^2=m^2+2mn+n^2
2.(b-4)=b^2-8b+16
3.(5-3y)=25-10*(-3y)+9y^2
4.(-2a+b)^2=-4a^2-4ab
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1.(m+n)^2=m^2+2mn+n^2
2.(b-4)=b^2-8b+16
3.(5-3y)=25-10*(-3y)+9y^2
4.(-2a+b)^2=-4a^2-4ab
Пояснення: