Question

va rogggggg...........,,,,​

Answer 1

Răspuns:

Explicație pas cu pas:

a) =x²-49

b)=4a²-25

c)=3-1=2

d) =7/4-2=(7-4)/4=3/4

e)=3/9-3=(3-27)/9=-24/9=-8/3

f)=(4-x²)(4+x²)=16-x^4

g) =(1-x²)(1+x²)=1-x^4