Question

16y2 – 25


help me i hate this school

Answer 1

Since both terms are perfect squares, factor using the difference of squares formula,
a
2
−
b
2
=
(
a
+
b
)
(
a
−
b
)
a
2
-
b
2
=
(
a
+
b
)
(
a
-
b
)
where
a
=
4
y
a
=
4
y
and
b
=
5
b
=
5
.
(
4
y
+
5
)
(
4
y
−
5
)

Answer 2

(4y)2 - (5)2 which is in the form a2 - b2

= (4y + 5) (4y - 5)

Explanation: