solve for x 50= x(2(x)+3)
50 = x(2x + 3)
50 = 2x² + 3x
0 = 2x² + 3x - 50
Quadratic formula: x = [ -b ± √( b² - 4·a·c ) ] / ( 2·a )
a = 2 b = 3 c = -50
x = [ -3 ± √( 3² - 4·2·-50 ) ] / ( 2·2 )
x = [ -3 ± √( 409) ] / ( 4 ) 4.30... or -5.80...