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Popular Algebra >

expand (sqrt(2)-3sqrt(a)b^2)^{14}

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Solution

expand (2​−3a​b2)14

Solution

128−26882​b2a​+52416ab4−3144962​b6aa​+2594592a2b8−77837762​b10a2a​+35026992a3b12−600462722​b14a3a​+157621464a4b16−1576214642​b18a4a​+236432196a5b20−1289630162​b22a5a​+96722262a6b24−223205222​b26a6a​+4782969a7b28
Solution steps
(2​−3a​b2)14
Apply binomial theorem: (a+b)n=i=0∑n​(in​)a(n−i)bia=2​,b=−3a​b2
=i=0∑14​(i14​)(2​)(14−i)(−3a​b2)i
Expand summation
=0!(14−0)!14!​(2​)14(−3a​b2)0+1!(14−1)!14!​(2​)13(−3a​b2)1+2!(14−2)!14!​(2​)12(−3a​b2)2+3!(14−3)!14!​(2​)11(−3a​b2)3+4!(14−4)!14!​(2​)10(−3a​b2)4+5!(14−5)!14!​(2​)9(−3a​b2)5+6!(14−6)!14!​(2​)8(−3a​b2)6+7!(14−7)!14!​(2​)7(−3a​b2)7+8!(14−8)!14!​(2​)6(−3a​b2)8+9!(14−9)!14!​(2​)5(−3a​b2)9+10!(14−10)!14!​(2​)4(−3a​b2)10+11!(14−11)!14!​(2​)3(−3a​b2)11+12!(14−12)!14!​(2​)2(−3a​b2)12+13!(14−13)!14!​(2​)1(−3a​b2)13+14!(14−14)!14!​(2​)0(−3a​b2)14
Simplify 0!(14−0)!14!​(2​)14(−3a​b2)0:128
Simplify 1!(14−1)!14!​(2​)13(−3a​b2)1:−26882​b2a​
Simplify 2!(14−2)!14!​(2​)12(−3a​b2)2:52416ab4
Simplify 3!(14−3)!14!​(2​)11(−3a​b2)3:−3144962​b6(a​)3
Simplify 4!(14−4)!14!​(2​)10(−3a​b2)4:2594592a2b8
Simplify 5!(14−5)!14!​(2​)9(−3a​b2)5:−77837762​b10(a​)5
Simplify 6!(14−6)!14!​(2​)8(−3a​b2)6:35026992a3b12
Simplify 7!(14−7)!14!​(2​)7(−3a​b2)7:−600462722​b14(a​)7
Simplify 8!(14−8)!14!​(2​)6(−3a​b2)8:157621464a4b16
Simplify 9!(14−9)!14!​(2​)5(−3a​b2)9:−1576214642​b18(a​)9
Simplify 10!(14−10)!14!​(2​)4(−3a​b2)10:236432196a5b20
Simplify 11!(14−11)!14!​(2​)3(−3a​b2)11:−1289630162​b22(a​)11
Simplify 12!(14−12)!14!​(2​)2(−3a​b2)12:96722262a6b24
Simplify 13!(14−13)!14!​(2​)1(−3a​b2)13:−223205222​b26(a​)13
Simplify 14!(14−14)!14!​(2​)0(−3a​b2)14:4782969a7b28
=128−26882​b2a​+52416ab4−3144962​b6(a​)3+2594592a2b8−77837762​b10(a​)5+35026992a3b12−600462722​b14(a​)7+157621464a4b16−1576214642​b18(a​)9+236432196a5b20−1289630162​b22(a​)11+96722262a6b24−223205222​b26(a​)13+4782969a7b28
(a​)3=aa​
(a​)5=a2a​
(a​)7=a3a​
(a​)9=a4a​
(a​)11=a5a​
(a​)13=a6a​
=128−26882​b2a​+52416ab4−3144962​b6aa​+2594592a2b8−77837762​b10a2a​+35026992a3b12−600462722​b14a3a​+157621464a4b16−1576214642​b18a4a​+236432196a5b20−1289630162​b22a5a​+96722262a6b24−223205222​b26a6a​+4782969a7b28

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