Added binomial expansion

mathgenerator/funcs/__init__.py

@@ -115,3 +115,4 @@ from .conditional_probability import *
 from .arc_length import *
 from .binomial_distribution import *
 from .stationary_points import *
+from .expanding import *

mathgenerator/funcs/expanding.py

@@ -0,0 +1,48 @@
+from .__init__ import *
+
+
+def expandingFunc(range_x1=10, range_x2=10, range_a=10, range_b=10):
+    x1 = random.randint(-range_x1, range_x1)
+    x2 = random.randint(-range_x2, range_x2)
+    a = random.randint(-range_a, range_a)
+    b = random.randint(-range_b, range_b)
+
+    def intParser(z):
+        if (z == 0):
+            return ""
+        if (z > 0):
+            return "+" + str(z)
+        if (z < 0):
+            return "-" + str(abs(z))
+
+    c1 = intParser(a * b)
+    c2 = intParser((a*x2)+(b*x1))
+    c3 = intParser(x1 * x2)
+
+    p1 = intParser(a)
+    p2 = intParser(x1)
+    p3 = intParser(b)
+    p4 = intParser(x2)
+
+    if p1 == "+1":
+        p1 = ""
+    if p1[0] == "+":
+        p1 = p1[1:]
+    if p3 == "+1":
+        p3 = ""
+    if p3 == "+":
+        p3 = p3[1:]
+    problem = f"({p1}x{p2})({p3}x{p4})"
+
+    if c1 == "+1":
+        c1 = ""
+    if c1[0] == "+":
+        c1 = c1[1:]  # Cuts off the plus for readability
+    if c2 == "+1":
+        c2 = ""
+    solution = f"{c1}*x^2{c2}*x{c3}"
+    return problem, solution
+
+
+expanding = Generator("Expanding Factored Binomial", 111, "(a*x-x1)(b*x-x2)",
+                      "a*b*x^2+(b*x1+a*x2)*x+x1*x2", expandingFunc)