PC Functions 1st Trimester 2015
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D.E.V.
Sunday, November 8, 2015
#6
This week we graphed polynomials. Now I know what a degree is and how to graph "easy" polynomials. But I don't understand these formulas:
a
2
−
b
2
=
a
2
−
2
ab
+
b
2
;
a
2
+
b
2
=(
a
−
b
)
2
+2
ab
a
3
−
b
3
=(
a
−
b
)(
a
2
+
ab
+
b
2
)
a
3
+
b
3
=(
a
+
b
)(
a
2
−
ab
+
b
2
)
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