Solution
To expand (2+x)5, we can use the Binomial Theorem. According to the Binomial Theorem:
(a+b)n=∑k=0n(kn)an−kbk
In this case, a=2, b=x, and n=5. We calculate each term of the expansion as follows:
(2+x)5=∑k=05(k5)25−kxk
Now, let's compute each term:
- k=0: (05)25x0=1⋅32⋅1=32
- k=1: (15)24x1=5⋅16⋅x=80x
- k=2: (25)23x2=10⋅8⋅x2=80x2
- k=3: (35)22x3=10⋅4⋅x3=40x3
- k=4: (45)21x4=5⋅2⋅x4=10x4
- k=5: (55)20x5=1⋅1⋅x5=x5
Now, summing these terms together:
(2+x)5=32+80x+80x2+40x3+10x4+x5
Thus, the expanded form is:
(2+x)5=x5+10x4+40x3+80x2+80x+32
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