Question

l) 5x-7(-2-5x)=13(1-2x)-113
m) (x+3)(x-7)=0
n) (x-1)(x+3)(x-4)=0
o) (x+3)(y-2)= -5
p) xy -5x= -10
q) 13xy+13y+12x+11=0
Dau coroana !

Answer 1

l)5x+14+35x=13-26x-113
40x+14=-26x-100
66x=-114
x=(-114)/66=(-19)/11

m)Are,doua,solutii
x₁=(-3),si,x₂=7

n)Are,trei,solutii
x₁=1;x₂=(-3),si,x₃=4

o)(x+3)(y-2)=-5
Pentru,x=2,avem,y=1
Pentru,x=(-2),avem,y=(-3)

p)x(y-5)=-10
Pentru,x=(-5),avem,y=7
Pentru,x=5,avem,y=3

q)Ultima,nu-mi,iese...Scuze!