Question

Gente me ajudem por favor!!! Vou dar o máximo de pontos!!

Answer 1

.
$b) \\ \\ (x-7)(x-7)=0 \\ \\ x-7=0 \\ x=7 \\ \\ ou \\ \\ (x-7)^2=0 \\ \\ x-7=0 \\ x=7$

c)
$(x+1)(x+2)=0 \\ \\ x+1=0~~~~ou~~~~x+2=0 \\ x=-1~~~~~~~~~ ~~~~x=-2$

d)
$(x+3)(x+3)=0 \\ \\ x+3=0 \\ x'=x"=-3 \\ \\ \\ (x-3)^2=0 \\ \\ x-3=0 \\ x'=x"=3$

e)
$(x-4)(x+3)=0 \\ \\ x-4=0~~~~~~ou~~~~~x+3=0 \\ x=+4~~~~~~~~~~~~~~~~~~x=-3$