Verified answer

Quadratic formula

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x = [ 2 ± √ ( 4 + 180 ) ] / 10

x = [ 2 ± √ 184 ] / 10

x = [ 2 ± 2√46 ] / 10

x = [ 1 ± √46 ] / 5

Use the quadratic equation formula and x will have two possible values.

Quadratic formula,

x = -b/2a +/- (1/2a)*sqrt(b^2 - 4ac)

= 1/5 +/- (1/10)*sqrt(4+180)

= 1/5 +/- (1/5)*sqrt(46).

Use calculator if you to get to a decimal value.