10-139. Without graphing, determine if the graph of each rule below has zero, one, or two x-intercepts. Show all work.
a.
y = 6x2 + 7x – 20
b.
y = x2 - 8x +16
c.
y = 2x2 + x + 3
d.
y= (2x+1)2

PLEASE SHOW EVERY STEP!!
This is from Core Connections Algebra, problem 10-139

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