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hac3r4Sergey
@hac3r4Sergey
June 2022
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Trofimkirillov
B1
(3x-2)(3x+2)-(2x+1)²-(5x-1)(x+2)=23
(9x²-4)-(4x²+4x+1)-(5x²+10x-x-2)=23
9x²-4-4x²-4x-1-5x²-10x+x+2=23
9x²-4x²-4x-5x²-10x+x=23+4+1-2
-13x=26
x=26:(-13)
x=-2
Ответ:x=-2
C1
(1/3a²-1/4b²)²-(1/3a²-1/2b²)(1/3a²+1/2b²)
1/9a⁴-1/6a²b²+1/16b⁴-(1/9a⁴-1/4b⁴)
1/9a⁴-1/6a²b²+1/16b⁴-1/9a⁴+1/4b⁴
-1/6a²b²+5/16b⁴
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Answers & Comments
(3x-2)(3x+2)-(2x+1)²-(5x-1)(x+2)=23
(9x²-4)-(4x²+4x+1)-(5x²+10x-x-2)=23
9x²-4-4x²-4x-1-5x²-10x+x+2=23
9x²-4x²-4x-5x²-10x+x=23+4+1-2
-13x=26
x=26:(-13)
x=-2
Ответ:x=-2
C1
(1/3a²-1/4b²)²-(1/3a²-1/2b²)(1/3a²+1/2b²)
1/9a⁴-1/6a²b²+1/16b⁴-(1/9a⁴-1/4b⁴)
1/9a⁴-1/6a²b²+1/16b⁴-1/9a⁴+1/4b⁴
-1/6a²b²+5/16b⁴