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Екатерина1578
@Екатерина1578
August 2021
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разложите на множители а)27b^3-1 б)8+а^3 в)16-2с^3 г)4-0,5b^3
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Lesben
1) 27b3-1=(3b)ˇ3- 1ˇ3 = (3b-1)(9bˇ2+3b +1)
2)8+aˇ3=2ˇ3+aˇ3=(2+a)(4-2a+aˇ2)
3)16-2.cˇ3=2.(8-cˇ3)=2.(2-c)(4+2c+cˇ2)
4)4-0,5bˇ3=1/2(8-bˇ3)=1/2(2-b)(4+2b+bˇ2)
3 votes
Thanks 1
litanalove
A) a^3-b^3=(a-b)(a²+ab+b²)
3^3*b^3 -1=(3b-1)(9b²+3b+1)
b) a^3+b^3=(a+b)(a²-ab+b²)
2^3 +a^3=(2+a)(4-2a+a²)
в) 2(8 -c^3)=2(2^3 -c^3) =
=2(2-c)(4+2c+c²)
г) 0.5(8 -b^3)=0.5(2^3 -b^3)
=0.5(2-b)(4+2b+b²)
0 votes
Thanks 0
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Answers & Comments
2)8+aˇ3=2ˇ3+aˇ3=(2+a)(4-2a+aˇ2)
3)16-2.cˇ3=2.(8-cˇ3)=2.(2-c)(4+2c+cˇ2)
4)4-0,5bˇ3=1/2(8-bˇ3)=1/2(2-b)(4+2b+bˇ2)
3^3*b^3 -1=(3b-1)(9b²+3b+1)
b) a^3+b^3=(a+b)(a²-ab+b²)
2^3 +a^3=(2+a)(4-2a+a²)
в) 2(8 -c^3)=2(2^3 -c^3) =
=2(2-c)(4+2c+c²)
г) 0.5(8 -b^3)=0.5(2^3 -b^3)
=0.5(2-b)(4+2b+b²)