найдите значения вырожения: (a+b)²+(a-b)² при а=-2,b=2 (x+y)²-(x-y)² при a=0,5,b=-0,5. Created by 12dana12. algebra-ru

найдите значения вырожения: (a+b)²+(a-b)² при а=-2,b=2 (x+y)²-(x-y)² при a=0,5,b...

12dana12 @12dana12

July 2022 2 3 Report

найдите значения вырожения:
(a+b)²+(a-b)² при а=-2,b=2
(x+y)²-(x-y)² при a=0,5,b=-0,5

kary87 1.(-2+2)^2+(-2-2)^2=0^2+(-4)^2=16
2.(0.5-0.5)^2-(0.5-(-0.5))^2=0+1^2=1

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Полиночка21 A)a²+2ab+b²+a²-2ab+b²=-2²+2*2*(-2)+2²-2*(-2)*2+2=4-8+4+2+8+4=14
b)x²+2xy+y²-(x²-2xy+y²)=0.5²+2*0.5*(-0.5²)-(0.5²-2*0.5*(-0.5)+(-0.5))=0.25-0.5+0.25-(0.25+0.5+0.25)=0.25-0.5+0.25-0.25-0.5-0.25

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