What is the value of #b^2-4ac# for the following equation: #2x^2+3x=-1#?
1 Answer
Mar 4, 2018
Explanation:
#"for a quadratic equation in "color(blue)"standard form"#
#•color(white)(x)ax^2+bx+c=0color(white)(x);a!=0#
#"then the "color(blue) "discriminant "Delta=b^2-4ac#
#"rearrange "2x^2+3x=-1" into standard form"#
#rArr2x^2+3x+1=0larrcolor(blue)"in standard form"#
#"with "a=2,b=3" and "c=1#
#rArrb^2-4ac#
#=3^2-(4xx2xx1)=9-8=1#
