Answer:
Option A , x = 7/5 and x= -1
Step-by-step explanation:
Formula: Let ax² + bx + c = 0 be the quadratic equation,
x = [-b±√(b²-4ac)]/2a
The given quadratic equation be
5x² -2x = 7
⇒ 5x² -2x - 7 = 0
a = 5, b = -2 and c = -7
Therefore x =[-b±√(b²-4ac)]/2a
x=[-(-2) ±
√((-2)²-4*5*(-7))]/2*5
x =[2 ± √144)]/10
x =[2 ± 12)]/10
x = (2+12)/10 and x = (2-12)/10
x = 14/10 = 7/5 and x= -12/10 = -1
Therefore,the correct answer is Option A , x = 7/5 and x= -1
