Question

9x^2 + 7x - 2 =0 then find the value of x using formula method
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Answer 1

Discriminant= b^2-4ac

Here, a=9, b=7, c=-2

7*7-4*9* -2

49+72= 121

therefore, root of discriminant= + or - 11

Quadratic formula= -b+ or - minus root of discriminant/2a

1. -7+11/18=4/18= 2/9

2. -7-11/18=-1

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