已知m,x,y,满足①2/3(x-5)05+5│m│=0已知m,x,y,满足①2/3(x-5)²+5│m│=0,②-2a²b的y+1次方与3a²b³是同类项,求代数式,-{-7/16x²y+[-1/4xy²+(-3/16x²y-3.475xy²)]-6.275xy²}+0.375x²y+5m

Question

已知m,x,y,满足①2/3(x-5)05+5│m│=0
已知m,x,y,满足①2/3(x-5)²+5│m│=0,②-2a²b的y+1次方与3a²b³是同类项,求代数式,-{-7/16x²y+[-1/4xy²+(-3/16x²y-3.475xy²)]-6.275xy²}+0.375x²y+5m²x的值.

Answer 1

①2/3(x-5)²+5│m│=0 则 x=5 m=0
②-2a²b的y+1次方与3a²b³是同类项,则 y+1=3 y=2
-{-7/16x²y+[-1/4xy²+(-3/16x²y-3.475xy²)]-6.275xy²}+0.375x²y+5m²x
=-{-7/16x²y+[-1/4xy²-3/16x²y-3.475xy²]-6.275xy²}+0.375x²y m=0
=-{-7/16x²y-1/4xy²-3/16x²y-3.475xy²-6.275xy²}+0.375x²y
=-{-10/16x²y-10xy²}+0.375x²y
=0.625x²y+10xy²+0.375x²y
=x^2y+10xy^2
=50+200
=250