Question

Solve by using formula:- x = -b ± √b²-4ac/ 2a complete solution 3q^2-2q=8

Answer 1

Answer:

Hope you understand !

Explanation:

3q2 = 2q + 8

Sol. 3q2 = 2q + 8

3q2 – 2q – 8 = 0

Comparing with aq2 + bq + c = 0 we have a = 3, b = – 2, c = – 8

b2 – 4ac = (– 2)2 – 4 (3) (– 8)

= 4 + 96

= 100

By Formula method,

q  = -  b ± √(b2 – 4ac)/2a

∴ q  =  -(-2) ± √100 /2(3)

∴ q =  2 ±10/6

∴ q  = 2 + 10 /6 = 12/6 = 2

∴ q  = 2 - 10 /6 = -8/6 = -4/3

q = 2 or -4/3

Answer 2

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