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zemfiraalieva060554
@zemfiraalieva060554
July 2022
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СРОЧНООООО!!!!!!ПОМОГИТЕ!!!!
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anutka042006
1.
а)(n-2)^2=n^2-4n+4
б)(2a+3b)^2=4a^2+12ab+9b^2
в)(x-5)(x+5)=x^2-25
г)(4x-y)(y+4x)=16x^2-y^2
2.
a)(a+3b)^2-(3a-b)^2=4(a-2b)*(2a+b)
б)a-b^2-b+a^2=(a-b)(1+a+b)
3.
3(2-x)^2-(2x^2+x-5)(x^2-2)+(x^2+4)(4-x^2)=18-10x+12x^2-3x^4-x^3=-3x^4-x^3+12x^2-10x+18
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Answers & Comments
а)(n-2)^2=n^2-4n+4
б)(2a+3b)^2=4a^2+12ab+9b^2
в)(x-5)(x+5)=x^2-25
г)(4x-y)(y+4x)=16x^2-y^2
2.
a)(a+3b)^2-(3a-b)^2=4(a-2b)*(2a+b)
б)a-b^2-b+a^2=(a-b)(1+a+b)
3.
3(2-x)^2-(2x^2+x-5)(x^2-2)+(x^2+4)(4-x^2)=18-10x+12x^2-3x^4-x^3=-3x^4-x^3+12x^2-10x+18