Answer:
Choice B is correct answer.
Step-by-step explanation:
We have given a quadratic equation.
7x²-x = 7
7x²-x-7 = 0
ax²+bx+c = 0 is general quadratic equation.
x =(-b±√b²-4ac) / 2a is quadratic formula to solve equation.
comparing general equation with given equation, we have
a = 7 , b= -1 and c = -7
Putting above values in quadratic formula , we have
x = (-(-1)±√(-1)²-4(7)(-7) ) / 2(7)
x = (1 ±√1+196) / 14
x = (1±√197) / 14 which is the answer.
