Question

socorro e pra intregar amanhã

Answer 1

( x + 1 ) ( x )
---------------- = 6
        2

x²+ x = 12

x² + x - 12 = 0

x = - 1 + - √1 + 48
     --------------------
                2

x = - 1 +7
    ------------
           2

x = 3

P = x + x + 2 + x + 1

P = 3 + 5 + 4

P = 12m        Alternativa d).

Answer 2

area=(b.h)/2
6=(x+1).x/2
6=x²+x/2
x²+x=6.2
x²+x=12
x²+x-12=0
Δ=1²-4.1.-12
Δ=1+48
Δ=49
x1=(-1+7)/2=6/2=3
x2=(-1-7)/2=-8/2=-4

Vamos considerar apenas x positivo.(x=3)
P=x+(x+2)+(x+1)
P=3+5+4
P=12

Resp: d)12m