a)5xy ²+3xy ² -xy ² b)1/2x ³ – 2x ² – 4x – 1/2 x ³ – x + 1 c)5xy + 1/2 x ² y – 2/3 xy + 2x ²y
a)5xy ²+3xy ² -xy ² b)1/2x ³ – 2x ² – 4x – 1/2 x ³ – x + 1 c)5xy + 1/2 x ² y – 2/3 xy + 2x ²y
By Abigail
By Abigail
a)5xy ²+3xy ² -xy ² b)1/2x ³ – 2x ² – 4x – 1/2 x ³ – x + 1 c)5xy + 1/2 x ² y – 2/3 xy + 2x ²y
Bạn tham khảo nhé:
a)5xy ²+3xy ²-xy ²
=7xy²
b)1/2x ³ – 2x ² – 4x – 1/2 x ³ – x + 1
=(1/2x ³- 1/2 x ³)- 2x ²-(4x+x)+1
=-2x²-5x+1
c)5xy + 1/2 x ² y – 2/3 xy + 2x ²y
= ($\frac{1}{2}$x ² y + 2x ²y)+(5xy-$\frac{2}{3}$xy)
=$\frac{5}{2}$x²y+$\frac{13}{3}$xy.
a)5xy²+3xy²-xy²
=7xy²
b)1/2x³ – 2x² – 4x – 1/2 x² – x + 1
=(1/2x³- 1/2 x³)- 2x²-(4x+x)+1
=-2x²-5x+1
c)5xy + 1/2x²y – 2/3 xy + 2x²y
= (1212x² y + 2x²y)+(5xy-2323xy)
=$\frac{5}{2}$ x²y+$\frac{13}{3}$xy
Chúc học tốt!!!