3x^2 + 20x = -32

=> 3x^2 + 20x + 32 = 0

=> 3x^2 + 12x + 8x + 32 = 0

=> 3x ( x + 4 ) + 8 ( x + 4 ) = 0

=> ( x + 4 ) ( 3x + 8 )= 0

If ( 3x + 8 ) = 0

Then, x = -8/3

If ( x + 4 ) = 0

Then x = -4

Answer : x = -4 , -8/3

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