x ² + 9 = 0 quadratic equation
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Answer:
x²+9=0
a = 1
b = 9
c= 0
x = -b±√b²-4ac
_________
2a
x = -9 ± √(9)²-4×1×0
_____________
2×1
x = -9±√81-0
_______
2
x= -9 +√81
______
2
x = -9+9 , -9-9
___ ____
2 2
x = 0 , x = -9
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