Question

Calcule X nas figuras: pelo menos duas por favor.

Answer 1

A)6x+6=9h
6=9x- 6x
6=3x
x=6/3
x=2

B)5×6=(x+4)×(x-3)
30= x^2 -3x+4x-12
x^2 +x -42
delta=1+ -4×-42
delta= 1+168
delta=169
x= -1+13/2
x=6

E)4^2=(x+2)×2
16=2x+4
16-4=2x
12/2=x
x=6

F)4^2=(6+x)×x
16=x^2+6x
x^2+6x-16=0
delta=36+ -4×-16
delta=36+64
delta=100
x=-6+10/2
x=4/2
x=2