Question

solve by formula 3x²+5x+7=0
when roots are not real.​

Answer 1

Step-by-step explanation:

a = -2  

Step-by-step explanation:

3 \sqrt{2}2 +2 \sqrt{3}3 = 3 \sqrt{2}2 -a\sqrt{3}3

3 \sqrt{2}2 gets cancelled on both sides

2 \sqrt{3}3 = - a\sqrt{3}3

2 \sqrt{3}3 + a\sqrt{3}3 = 0

\sqrt{3}3 (2+a) = 0

(2+a) = 0                                                               (0 by  \sqrt{3}3 = 0)    

a = -2