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22.03.2021 •
Mathematics
Evaluate the expression 8 +3 +(-12) +4=
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Ответ:
3
1. Remove parentheses.
8 + 3 - 12 + 4
2. Simplify 8 + 3 to 11.
11 - 12 + 4
3. Simplify 11 - 12 = -1.
-1 + 4
4. Simplify.
3
Ответ:
Ответ:
Expansion for there will be 9 terms.
(a+b) ^n =nco a^n b^o+ nc1 a^(n-1) b^1+nc2 a^(n-2) b^2+nc3 a(n-3) b^3+nc4 a^(n-4) b^4+ncn a^o b^n.
5th term of (2x+y)^8 = ?
5th term is nC4 a^(n-4) b^4
a=2x, b=y, n=8
therefore 8C4 (2x)^(8-4) (y)^4
8!/((8-4)! 4!) (2x)^4 y^4
40320/576 (16 x^4 ) (y^4)
70 (16x^4)(y^4)
1120 X^4 Y^4
Step-by-step explanation: