Question

2. Haz las siguientes sumas.
A. (5x2 - 7x - 8) + (-3x - 9)
B. (4x2 + 2ab + 5b) + (6a2 - 7ab)
C. (-15mn2 + 6m?n - 9m) + (-13m2 - 2m + 3)
D. (m? - m2)+(-{m} + m2)
E. (-6x*y2 + 7x²y3 – 9)+(-** y2 +1)
8a3b4 a*b*) + (-5a4b3a%b4
​

Answer 1

Respuesta:

a $\left(5x\cdot \:2-7x-8\right)+\left(-3x-9\right)=-17$

b $\left(4x\cdot \:2+2ab+5b\right)+\left(6a\cdot \:2-7ab\right)=8x+12a-5ab+5b$

c $\left(-15mn\cdot \:2+6mn-9m\right)+\left(-13m\cdot \:2-2m+3\right)=-24mn-37m+3$

d $\left(m-m\cdot \:2\right)+\left(-m+m\cdot \:2\right)=0$

e (No la entiendo)