помогите решить эти задания. Created by Nastya171167. algebra-ru

помогите решить эти задания...

Nastya171167 @Nastya171167

August 2022 1 44 Report

помогите решить эти задания

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sedinalana

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1
(x+3)(y-2)+2x-3y+1=xy-2x+3y-6+2x-3y+1=xy-5
2
$24a^5y^4/(2a^2y)^3=24a^5y^4/8a^6y^3=3y/a$
3
4px+3py-4qx-3qy=p(4x+3y)-q(4x+3y)=(4x+3y)(p-q)
4
[(9a²+b²)/3+2ab]:(3a+b)/6=(9a²+b²+6ab)/3*6/(3a+b)=(3a+b)²*2/(3a+b)=
=2(3a+b)
1
(t+2)²-(4t+2)=t²+4t+4-4t-2=t²+2
2
$15x^4b^3/5(xb^2)^415x^4b^3/5x^4b^8=3/b^5$
3
2ac+2ad-5bc-5bd=2a(c+d)-5b(c+d)=(c+d)(2a-5b)
4
25/(c-5d)*[(c²+25d²)/5-2cd]=25/(c-5d)*(c²+25d²-10cd)/5=
=25/(c-5d)*(c-5d)²/5=5(c-5d)
1
(x-2)(y+5)-5x+2y=xy+5x-2y-10-5x+2y=xy-10
2
$12b^3c^6/(3bc)^2=12b^3c^6/9b^2c^6=4b/3$
3
3tx-2yt-3zx+2zy=t(3x-2y)-z(3x-2y)=(3x-2y)(t-z)
4
[(4x²+y²)/2+2xy]:(2x+y)/4=(4x²+y²+4xy)/2*4/(2x+y)=
=(2x+y)²*2/(2x+y)=2(2x+y)

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