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ICSE Class 10 Answered

x2 +(3–2a)x – 6a=0
Asked by sarthakuniyal149 | 30 Mar, 2019, 02:09: PM
answered-by-expert Expert Answer
x2 - (3 - 2a)x - 6a = 0
Comparing with ax2 + bx + c = 0
a = 1, b = -(3 - 2a), c = -6a
b2 - 4ac = (3 - 2a)2 - 4 (1) (-6a) 
            = 9 - 12a + 4a2 + 24a
            = 4a2 + 12a + 9
            = (2a + 3)2
Using formula we get x as 3 or -2a.
 
Answered by Sneha shidid | 30 Mar, 2019, 02:31: PM

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