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Кошка5учёная
@Кошка5учёная
July 2022
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Помогите, пожалуйста . §16, оба вариант. Прошу вас
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Lesben
1a)xˇ2 -yˇ2 = (x+y)(x-y)
b)4aˇ2 - bˇ2 = (2a+b)(2a-b)
c)0,09aˇ2 -9bˇ2 = 9(0,01aˇ2 - bˇ2)=9.(0,1a+b)(0,1-b)
2a)144-25yˇ2 = (12+5y)(12-5y)
b)aˇ2bˇ2 - 4 = (ab+2)(ab-2)
c)4/9xˇ2 -1/16yˇ2 = (2/3x+1/4y)(2/3x - 1/4y)
3a)79ˇ2 -21ˇ2 = (79+21 )(79-21) = 100.58=5800
b)17,8ˇ2 - 7,8ˇ2 = (17,8+7,8)(17,8 -7,8)=25,6.10=256
1a)mˇ2 - nˇ2 = (m+n)(m-n)
b)9xˇ2 -yˇ2 = ( 3x+y)(3x-y)
c)49cˇ2 - 0,04aˇ2 = (7c+0,2a)(7c - 0,2a)
2a)121-36xˇ2 = (11+6x)(11-6x)
b)xˇ4yˇ4 - 9 = (xˇ2yˇ2+3)(xˇ2yˇ2 -3)
c)16/49aˇ2 - 1/9bˇ2 = (4/7a+1/3b)(4/7a - 1/3b)
3a)86ˇ2-14ˇ2 = (86+14)(86-14) = 100.72 = 7200
b)15,9ˇ2 -5,9ˇ2 = (15,9+5,9)(15,9-5,9)=21,8.10=218
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Thanks 1
gkrasavin
X²-y²=(x-y)(x+y)
4a²-b²=(2a-b)(2a+b)
0,09а²-9b²=(0,03а-3b)(0,03a+3b)
144-25y²=(12+5y)(12-5y)
a²b²-4=(ab-2)(ab+2)
4/9х²-1/16у²=(2/3х-1/4у)(2/3х+1/4у)
79²-21²=(79+21)(79-21)=100×58=580
17,8²-7,8²=(17,8-7,8)(17,8+7,8)=10×25,6=256
m²-n²=(m+n)(m-n)
9x²-y²=(3x-y)(3x+y)
49c²-0,04a²=(7+0,2a)(7-0,2a)
121-36х²=(11-6х)(11+6х)
x∧4y∧4-9=(x²y²-3)(x²y²+3)
16/49а²-1/9b²=(4/7а-1/3b)(4/7а+1/3b)
86²-14²=(86+14)(86-14)=100×72=720
15,9-5,9=(15,9-5,9)(15,9+5,9)=10×25,8=258
0 votes
Thanks 0
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Answers & Comments
b)4aˇ2 - bˇ2 = (2a+b)(2a-b)
c)0,09aˇ2 -9bˇ2 = 9(0,01aˇ2 - bˇ2)=9.(0,1a+b)(0,1-b)
2a)144-25yˇ2 = (12+5y)(12-5y)
b)aˇ2bˇ2 - 4 = (ab+2)(ab-2)
c)4/9xˇ2 -1/16yˇ2 = (2/3x+1/4y)(2/3x - 1/4y)
3a)79ˇ2 -21ˇ2 = (79+21 )(79-21) = 100.58=5800
b)17,8ˇ2 - 7,8ˇ2 = (17,8+7,8)(17,8 -7,8)=25,6.10=256
1a)mˇ2 - nˇ2 = (m+n)(m-n)
b)9xˇ2 -yˇ2 = ( 3x+y)(3x-y)
c)49cˇ2 - 0,04aˇ2 = (7c+0,2a)(7c - 0,2a)
2a)121-36xˇ2 = (11+6x)(11-6x)
b)xˇ4yˇ4 - 9 = (xˇ2yˇ2+3)(xˇ2yˇ2 -3)
c)16/49aˇ2 - 1/9bˇ2 = (4/7a+1/3b)(4/7a - 1/3b)
3a)86ˇ2-14ˇ2 = (86+14)(86-14) = 100.72 = 7200
b)15,9ˇ2 -5,9ˇ2 = (15,9+5,9)(15,9-5,9)=21,8.10=218
4a²-b²=(2a-b)(2a+b)
0,09а²-9b²=(0,03а-3b)(0,03a+3b)
144-25y²=(12+5y)(12-5y)
a²b²-4=(ab-2)(ab+2)
4/9х²-1/16у²=(2/3х-1/4у)(2/3х+1/4у)
79²-21²=(79+21)(79-21)=100×58=580
17,8²-7,8²=(17,8-7,8)(17,8+7,8)=10×25,6=256
m²-n²=(m+n)(m-n)
9x²-y²=(3x-y)(3x+y)
49c²-0,04a²=(7+0,2a)(7-0,2a)
121-36х²=(11-6х)(11+6х)
x∧4y∧4-9=(x²y²-3)(x²y²+3)
16/49а²-1/9b²=(4/7а-1/3b)(4/7а+1/3b)
86²-14²=(86+14)(86-14)=100×72=720
15,9-5,9=(15,9-5,9)(15,9+5,9)=10×25,8=258