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YukiFox
@YukiFox
June 2021
1
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Упростите выражение.
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Trofimkirillov
А)(x-3)²+x(x+9)
x²-6x+9+x²+9x
2x²+3x+9
б)(2a+5)²-5(4a+5)
4a²+20a+25-20a-25
4a²
в)9b(b-1)-(3b+2)²
9b²-9b-9b²+12b+4
3b+4
г)(b-4)²+(b-1)(2-b)
b²-8b+16+2b-b²-2+b
-5b+14
д)(a+3)(5-a)-(a-1)²
5a-a²+15-3a-a²-2a+1
-2a²+16
е)(5+2y)(y-3)-(5-2y)²
5y-15+2y²-6y-25-20y+4y²
-21y-40+6y²
6y²-21y-40
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Answers & Comments
x²-6x+9+x²+9x
2x²+3x+9
б)(2a+5)²-5(4a+5)
4a²+20a+25-20a-25
4a²
в)9b(b-1)-(3b+2)²
9b²-9b-9b²+12b+4
3b+4
г)(b-4)²+(b-1)(2-b)
b²-8b+16+2b-b²-2+b
-5b+14
д)(a+3)(5-a)-(a-1)²
5a-a²+15-3a-a²-2a+1
-2a²+16
е)(5+2y)(y-3)-(5-2y)²
5y-15+2y²-6y-25-20y+4y²
-21y-40+6y²
6y²-21y-40