Question

Me Ajude!!!!!! por favor e pra hoje esse dever
d) (3x³-2x²-x+4)-(5x²+28x³-9)=?
e)(-13a²-8a+2)+(-a²-16a+63)=?
f)(x-7xy-11y)-(12x+9x²-21x³)=?
g)(6x³-10x²+2x)+(x²+x²y-x²y-y²)=?
h)(3m³+2m²-m+8)-(4m³-5m²-3m+11)=?
i)(-6ax²+15x-3)+(x-7ax²-11)=?

Answer 1

d) (3x³-2x²-x+4)-(5x²+28x³-9)= 3x³-2x²-4x+4-5x²-28x³+9=
-25x³-7x²-4x+13

e)(-13a²-8a+2)+(-a²-16a+63)=
-13a²-8a+2-a²-16a-63=-14a²-24a-61

f)(x-7xy-11y)-(12x+9x²-21x³)=

x-7xy-11y-12x-9x²+21x³=21x³-9x²-11x-11y-7xy

g)(6x³-10x²+2x)+(x²+x²y-x²y-y²)=

6x³-10x²+2x+x²+x²y-x²y-y²=6x³-9x²+2x-y²

h)(3m³+2m²-m+8)-(4m³-5m²-3m+11)=

3m³+2m²-m+8-4m³+5m²+3m-11=-m³+7m²-2m-3

i)(-6ax²+15x-3)+(x-7ax²-11)=

-6ax²+15x-3+x-7ax²-11=-13ax²+16x-14