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\[{(y-7)}^{2}\]
+
−
.
ln
>
<
×
÷
/
log
≥
≤
(
)
log
x
=
%
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expand((y-7)^(2))
expand (y-7)^(2)
{(y-7)}^{2}
1
Use
Square of Difference
:
(
a
−
b
)
2
=
a
2
−
2
a
b
+
b
2
{(a-b)}^{2}={a}^{2}-2ab+{b}^{2}
(
a
−
b
)
2
=
a
2
−
2
a
b
+
b
2
.
y
2
−
2
y
×
7
+
7
2
{y}^{2}-2y\times 7+{7}^{2}
y
2
−
2
y
×
7
+
7
2
2
Simplify
7
2
{7}^{2}
7
2
to
49
49
4
9
.
y
2
−
2
y
×
7
+
49
{y}^{2}-2y\times 7+49
y
2
−
2
y
×
7
+
4
9
3
Simplify
2
y
×
7
2y\times 7
2
y
×
7
to
14
y
14y
1
4
y
.
y
2
−
14
y
+
49
{y}^{2}-14y+49
y
2
−
1
4
y
+
4
9
Done
y^2-14*y+49
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