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Kamyshlov052
@Kamyshlov052
July 2022
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РЕШИТЕ ПОЖАЛУЙСТА, ХОТЬ ПОЛОВИНУ
1) (3x+y)(x+y)-4y(x-y)=
2) (c+2)(c-3)-(с+1)(с+3)=
3) (4x-3)^2-6x(4-x)
4) (p+3)(p-11)+(p+6)^2
5)(a-x)^2+(a+x)^2
6)2(x+6)^2-(20x+70)
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nnnwww
1) (3x+y)(x+y)-4y(x-y)=3x^2+3xy+xy+y^2-4xy+4y^2=3x^2+0+5y^2=3x^2+5y^2
2) (c+2)(c-3)-(с+1)(с+3)=c^2-3c+2c-6-(c^2+3c+c+3)=c^2-3c+2c-6-c^2-4c-3=-5c-9
3) (4x-3)^2-6x(4-x)=16x^2-24x+9-24x+6x^2=22x^2-48x+9
4) (p+3)(p-11)+(p+6)^2=p^2-11p+3p-33+p^2+12p+36=2p^2+4p+3
5) (a-x)^2+(a+x)^2=a^2-2ax+x^2+a^2+2ax+x^2=2a^2+2x^2
6) 2(x+6)^2-(20x+70)=2 (x+6)^2-10 (2x+7)=2 ((x+6)^2-5 (2x+7))=2 (x^2+12x+36-10x-35)=2 (x^2+2x+1)=2 (x+1)^2
1 votes
Thanks 1
Kamyshlov052
5 и 6 не правильно, но всё равно спасибо:)
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Answers & Comments
2) (c+2)(c-3)-(с+1)(с+3)=c^2-3c+2c-6-(c^2+3c+c+3)=c^2-3c+2c-6-c^2-4c-3=-5c-9
3) (4x-3)^2-6x(4-x)=16x^2-24x+9-24x+6x^2=22x^2-48x+9
4) (p+3)(p-11)+(p+6)^2=p^2-11p+3p-33+p^2+12p+36=2p^2+4p+3
5) (a-x)^2+(a+x)^2=a^2-2ax+x^2+a^2+2ax+x^2=2a^2+2x^2
6) 2(x+6)^2-(20x+70)=2 (x+6)^2-10 (2x+7)=2 ((x+6)^2-5 (2x+7))=2 (x^2+12x+36-10x-35)=2 (x^2+2x+1)=2 (x+1)^2