Verified answer

x = ( -b ± √( b² - ac ) ) / 2a

a = 5

b = -14

c = 14

x = ( 14 ± √( (-14)² - 4(5)(14) ) ) / 2(5)

x = ( 14 ± √( -84) ) / 10

x = ( 14 ± 2i√( 21 ) ) / 10

x = ( 7 ± i√( 21 ) ) / 5

x = [ - b ± √ (b² - 4ac) ] / 2a

x = [ 14 ± √ (196 - 280) ] / 10

x = [ 14 ± √ ( - 84) ] / 10

x = [ 14 ± i 2√21 ] / 10

x = [ 7 ± i √21 ] / 5