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МаленькаяРоза45
@МаленькаяРоза45
June 2022
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Помогите пожалуйста!!!
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Nurickas
ДОМАШНЯЯ РАБОТА
N 1
a)(2x-1)^2=4x^2-4x+1
б)(3a+c)^2=9a^2+6ac+c^2
в)(y-5)(y+5)=y^2-25
г)(4b+5c)(4b-5c)=16b^2+16bc-5c
N 2
(x+y)(x-y)-(x^2+3y^2)=x^2-y^2-x^2-3y^2=-4y^2
N 3
a) 16y^2 - 0.25=(4y-0.5)(4y+0.5)
b)a^2+10ab+25b^2=(a+5b)^2
N 4
(5-x)^2-x(2.5+x)=0
25-10x+x^2-25x-x^2=0
25-12.5x=0
-12.5x=-25
x=2
N 5
Только ответы:
а)4a^2-b^4
б)36x^6-12x^4+x^2
в)y^4-2b^2y^2+b^4
N6
a)25x^2-4-25x^2+10x-1=4
10x=4+5
10x=9
x=0.9
b)100x^2-16=0
100x^2=16
x^2=16/100
x=+-0.4
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Answers & Comments
N 1
a)(2x-1)^2=4x^2-4x+1
б)(3a+c)^2=9a^2+6ac+c^2
в)(y-5)(y+5)=y^2-25
г)(4b+5c)(4b-5c)=16b^2+16bc-5c
N 2
(x+y)(x-y)-(x^2+3y^2)=x^2-y^2-x^2-3y^2=-4y^2
N 3
a) 16y^2 - 0.25=(4y-0.5)(4y+0.5)
b)a^2+10ab+25b^2=(a+5b)^2
N 4
(5-x)^2-x(2.5+x)=0
25-10x+x^2-25x-x^2=0
25-12.5x=0
-12.5x=-25
x=2
N 5
Только ответы:
а)4a^2-b^4
б)36x^6-12x^4+x^2
в)y^4-2b^2y^2+b^4
N6
a)25x^2-4-25x^2+10x-1=4
10x=4+5
10x=9
x=0.9
b)100x^2-16=0
100x^2=16
x^2=16/100
x=+-0.4