Verified Answer :

Use the quadratic Equation: 
x = [ -b ±√ (b² - 4ac) ] / 2a 
x = [ -(3.2) ±√ ( (3.2)² - 4(.7)(1.5) ) ] / 2(.7) 
x = [ -3.2 ±√ ( (10.24 - 4.2 ) ] / 1.4 
x = [ -3.2 ±√6.04 ] / 1.4 
x = { [ -3.2 - √6.04 ] / 1.4, [ -3.2 +√6.04 ] / 1.4 } 
x = { -4.041, -0.530 }

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