Question

X^2+x-7=5 me ajudem.....

Answer 1

X^2+x-7=5
X^2+x-7-5=0
X^2+x-12=0
delta= 1^2- 4.1.(-12)
delta= 1+48
delta= 49

x= -1+- raíz49 /2
x= -1 +- 7 /2

x'= -1+7= +6/2= +3
x"= -1-7= -8/2= -4