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Fedchenkova12345
@Fedchenkova12345
June 2022
2
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Упростите выражение:
1)(х-4)²-16
2)10а+(а-5)²
3)(3m-7n)²-(3m-7n)²
4)b(b-3)-(b-4)²
5)(12a-b)2-(9a-b)(16a+2b)
6)x(2x-9)²-2x(15+x)²
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Answers & Comments
selmash21
1)=х^2-8х+16-16=х^2-8х
2)=10а+а^2-10а+25=а^2+25
3)=0
4)=б^2-3б-б^2+8б-16=5б-16
5)=144а^2-24аб+б^2-144а^2-18аб+16аб+2б^2=3б^2-26аб
6)=х(4х^2-36х+81)-2х(225+30х+х^2)=4х^3-36х^2+81х-450х-60х^2-2х^3=2х^3-96х^2-369х
1 votes
Thanks 3
defare12
1) x2-8x+16-16=x(x-8)
2) 10a+a2-10a+25=a2+25=a+5
3) 9m2-42mn+49m2-9m2+42mn-49n2=0
4) b2-3b-b2+8b-16=5b-16
5) 144a2-24ab+b2-(144a2+18ab-16ab-2b2)=144a2-24ab+b2-144a2-2ab+2b2=3b2-26ab=b(3b-26a)
6) x(4x2-36x+81)-2x(225+x2+30x)=4x3-36x2+81x-450x-2x3-60x2=2x3-96x2-369x
0 votes
Thanks 1
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Answers & Comments
2)=10а+а^2-10а+25=а^2+25
3)=0
4)=б^2-3б-б^2+8б-16=5б-16
5)=144а^2-24аб+б^2-144а^2-18аб+16аб+2б^2=3б^2-26аб
6)=х(4х^2-36х+81)-2х(225+30х+х^2)=4х^3-36х^2+81х-450х-60х^2-2х^3=2х^3-96х^2-369х
2) 10a+a2-10a+25=a2+25=a+5
3) 9m2-42mn+49m2-9m2+42mn-49n2=0
4) b2-3b-b2+8b-16=5b-16
5) 144a2-24ab+b2-(144a2+18ab-16ab-2b2)=144a2-24ab+b2-144a2-2ab+2b2=3b2-26ab=b(3b-26a)
6) x(4x2-36x+81)-2x(225+x2+30x)=4x3-36x2+81x-450x-2x3-60x2=2x3-96x2-369x