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makvak
@makvak
July 2022
1
2
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№2
упростите выражение
(x+5)^2-5x(2-x)
16y+2(y-4)^2
№3 разложите на множетили
81-a^2
5x^2-y^2
3x^2-6xy+3y^2
(x-2)^2-16
81y^4-x^4
№4 упростите выражение
(a^2+4a)^2-a^2(a-2)(a+2)-4a^2(2a-1)
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Answers & Comments
imanbek
1. (x+5)^2 - 5x(2-x) = x^2 + 10x + 25 - 10x+ 5x^2 = 6x^2+25
16y+2(y-4)^2= 16y+2(y^2-8y+16)=16y+2y^2-16y+32=2y^2+32
81-a2=(9-a)(9+a)
11 votes
Thanks 9
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Answers & Comments
16y+2(y-4)^2= 16y+2(y^2-8y+16)=16y+2y^2-16y+32=2y^2+32
81-a2=(9-a)(9+a)