Объяснение:
a)(a+3)^2=(a+3)*(a+3)=a^2+6a+9
б)(c-6)^2=(c+6)*(c-6)=c^2-12c+36
в)(5-x)^2=(5+x)*(5-x)=25-10x+x^2
г)(4+y)^2=(4+y)*(4+y)=16+8y+y^2
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Объяснение:
a)(a+3)^2=(a+3)*(a+3)=a^2+6a+9
б)(c-6)^2=(c+6)*(c-6)=c^2-12c+36
в)(5-x)^2=(5+x)*(5-x)=25-10x+x^2
г)(4+y)^2=(4+y)*(4+y)=16+8y+y^2