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Author: anserwaseem

ex4_3FindingMoreRoots.pyde

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+from math import sqrt
+#set the range of x-values 
+xmin = -10
+xmax = 10
+
+#range of y-values 
+ymin = -10
+ymax = 10
+
+#calculate the range
+rangex = xmax - xmin
+rangey = ymax - ymin
+
+def setup():
+    global xscl, yscl
+    size(600,600)
+    xscl = width / rangex
+    yscl = -height / rangey
+    
+def draw():
+    global xscl, yscl 
+    background(255) #white
+    translate(width/2,height/2) #cyan lines
+    grid(xscl, yscl)
+    graphFunction()
+    
+def grid(xscl, yscl):    
+    strokeWeight(1) 
+    stroke(0,255,255)
+    for i in range(xmin,xmax + 1):
+        line(i*xscl,ymin*yscl,i*xscl,ymax*yscl)
+        line(xmin*xscl,i*yscl,xmax*xscl,i*yscl)
+    
+    #creating x-axis and y-axis lines
+    stroke(0) #black
+    line(0, ymin*yscl, 0, ymax*yscl)
+    line(xmin*xscl, 0, xmax*xscl, 0)
+
+def f(x):
+    return 2*x**2 + 7*x - 15
+
+def graphFunction():
+    x=xmin
+    while x<=xmax:
+        stroke(255,0,0)
+        fill(0,0,255)
+        line(x*xscl, f(x)*yscl, (x+0.1)*xscl, f(x+0.1)*yscl)
+        x+=0.1
+        
+def quad(a, b, c):
+    return (-b+(sqrt(b**2 - 4*a*c)))/(2*a), (-b-(sqrt(b**2 - 4*a*c)))/(2*a)
+
+print(quad(2,7,-15))