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June 2022
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1)упростите вырожение
1.(2b-3)(3+2B)-4b(b-2)+9
2 25g^4-(5g^2+2)(2-5g^2)-49g^4
2)yfqlbnt pyfxtybt dshf;tybz
(a^2-b)(a^2+b)-2a^4 при a=5:b=4
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KPOOBb
1.(2b-3)(2b+3)-4b^2+8b+9=4b^2-9-4b^2+8b+9=8b
2.(25g^4-49g^4)-(2+5g^2)(2-5g^2)=-24g^4-(4-25g^4)=-24g^4-4+25g^4=g^4-4=(g^2-2)(g^2+2)
3.a^4-b^2-2a^4=-a^4-b^2=-5^4-4^2=-625-1=-641
1 votes
Thanks 2
s00s
спасибо большое
nbalak004
не за чтоо))))
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Answers & Comments
2.(25g^4-49g^4)-(2+5g^2)(2-5g^2)=-24g^4-(4-25g^4)=-24g^4-4+25g^4=g^4-4=(g^2-2)(g^2+2)
3.a^4-b^2-2a^4=-a^4-b^2=-5^4-4^2=-625-1=-641