Ответ:
Объяснение:
1) a=6¹/₅=6,2 b=2,4
10ab-5b²-6a+3b=5b*(2-b)-3*(2a-b)=(2a-b)(5b-3)=
=(2*6,2-2,4)(5*2,4-3)=(12,4-2,4)(12-3)=10*9=90.
2) x=2²/₃=8/3.
3x³+x²-3x-1=x²*(3x+1)-(3x+1)=(3x+1)(x²-1)=)(3*(8/3)+1)((8/3)²-1)=
=(8+1)((64/9)-1)=9*((64-9)/9)=9*(55/9)=55.
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Verified answer
Ответ:
Объяснение:
1) a=6¹/₅=6,2 b=2,4
10ab-5b²-6a+3b=5b*(2-b)-3*(2a-b)=(2a-b)(5b-3)=
=(2*6,2-2,4)(5*2,4-3)=(12,4-2,4)(12-3)=10*9=90.
2) x=2²/₃=8/3.
3x³+x²-3x-1=x²*(3x+1)-(3x+1)=(3x+1)(x²-1)=)(3*(8/3)+1)((8/3)²-1)=
=(8+1)((64/9)-1)=9*((64-9)/9)=9*(55/9)=55.