Answers

2015-12-26T18:00:10+05:30
X(x+1) = 30

=> x^2 + x - 30 = 0

=> ( x - 5 ) ( x + 6 ) = 0

INFORMATION PROVIDED

1) Since the degree of equation is 2 , therefore it represents a parabola .

2) Since co-efficient of x^2 is positive so the parabola is concave (open) upwards .

3) Since its discriminant ( D = b^2 - 4ac ) is positive and non-zero, therfore the parabola intersects x-axis at two points = zeroes of the equation = 5 and -6

4) The vertex of the parbola is given at ( -b/2a , -D/4a )
=> Vertex is at ( -1/2 , -30.25 )

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2015-12-26T21:06:02+05:30
X x +1=30
2x +1=30
2x=30-1
2x=29
x =29/2
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