MATH LIKE ALWAYS
posted by eva .
HOW MANY TIMES DOES THE GRAPH OF
2
2X 2X+3 INTERSECT THE XAXIS?

2 x^2  2 x + 3 = 0
x = [2 +/ sqrt (2^24*2*3)] /4
= [ 2 +/ sqrt (4  24) ]/4
= [ 2 +/ sqrt (20) ] / 4
 20 is imaginary so this parabola never crosses the x axis.