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