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NastenkaLD
@NastenkaLD
March 2022
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Помогите решить примеры пожалуйста
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notentirely
1) а) (x+2)2+(2x-1)2= x2+4x+4+4x2-4x+1=5x2+5=5(x2+1)
б)(10-7y)(7y+10)=100-49y2
в) (2+а)(4-2а+а2)=8+а3
г) (а+3)3=а3+9а2+27а+27
2) 100а2-20а+1=(10-1)2
81x2-25y2=(9x-5y)(9x+5y)
27x3-125y3=(3x-5y)(9x2+15xy+25y2)
x4-x3-x+1=(x-1)
1 votes
Thanks 1
NastenkaLD
Хоспади, спасибо
notentirely
не за что!
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Answers & Comments
б)(10-7y)(7y+10)=100-49y2
в) (2+а)(4-2а+а2)=8+а3
г) (а+3)3=а3+9а2+27а+27
2) 100а2-20а+1=(10-1)2
81x2-25y2=(9x-5y)(9x+5y)
27x3-125y3=(3x-5y)(9x2+15xy+25y2)
x4-x3-x+1=(x-1)