Question

(8x+6) (x+6)=100 alguem sabe

Answer 1

Boa noite

(8x + 6)*(x + 6) = 100 

8x² + 8x*6 + 6x + 6*6 = 100
8x² + 54x + 36 = 100
8x² + 54x - 64 = 0 

delta
d² =  54² + 4*8*64 = 4964
d = 2*√1241 

x1 = (-54 + 2√1241)/16 = (-27 + √1241)/8
x2 = (-54 - 2√1241)/16 = (-27 - √1241)/8