1) (x+y+z)×(x+y+z)
2) (a-b)×(b-c+b-c)×(c-a+c-a)×(a-b)
3)(x+y)×(x+y)×(x+y)
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Answer:
Step-by-step explanation: Expand
(
x
+
y
+
z
)
(
x
−
y
−
z
)
by multiplying each term in the first expression by each term in the second expression.
x
⋅
x
+
x
(
−
y
)
+
x
(
−
z
)
+
y
x
+
y
(
−
y
)
+
y
(
−
z
)
+
z
x
+
z
(
−
y
)
+
z
(
−
z
)
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