Quadratic Equations

Quantitative Aptitude(IBPS PO)

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I) 3m² + 19m + 28 = 0

II) 2n² + 13n + 21 = 0

m<=n

m>n

m>=n

Can’t be determined

Explanation:

I) 3m² + 19m + 28 = 0
3m² + 12m + 7m + 28 = 0
3m (m + 4) + 7 (m + 4) = 0
(3m + 7) (m + 4) = 0
m = -7/3, -4 = -2.33, – 4
II) 2n² + 13n + 21 = 0
2n² + 6n + 7n + 21 = 0
2n (n + 3) + 7 (n + 3) = 0
(2n + 7) (n + 3) = 0
n = -7/2, -3 = -3.5, -3
I) 3m² + 19m + 28 = 0
3m² + 12m + 7m + 28 = 0
3m (m + 4) + 7 (m + 4) = 0
(3m + 7) (m + 4) = 0
m = -7/3, -4 = -2.33, – 4
II) 2n² + 13n + 21 = 0
2n² + 6n + 7n + 21 = 0
2n (n + 3) + 7 (n + 3) = 0
(2n + 7) (n + 3) = 0
n = -7/2, -3 = -3.5, -3
Can’t be determined

By: Amit Kumar

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