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Manipulations and Factorization of Polynomials Simplify 1.(5a^3-a)+(6a^2-7a+1)-(2a^3+4a-1) 2.(3a+1)(a-2) 3.(2x^2-3x+1)(x^2-x-1) Factorize 1.3a^2b-6ab^2 2.-3xy^2z+6x^2yz^2-9xy^2z^2 3.x^2-6x+9 4.x^2-36 睇吾明可以問 知道答案的plz help!!!
最佳解答:
Simplify 1.(5a^3-a)+(6a^2-7a+1)-(2a^3+4a-1) =5a^3-a+6a^2-7a+1-2a^3-4a+1 =3a^3+6a^2-12a+2 2.(3a+1)(a-2) =3a^2-6a+a-2 =3a^2-5a-2 3.(2x^2-3x+1)(x^2-x-1) =2x^4-2x^3-2x^2-3x^3+3x^2+3x+x^2-x-1 =2x^4-5x^3+2x^2-2x-1 Factorize 1.3a^2b-6ab^2 =3ab(a-2b) 2.-3xy^2z+6x^2yz^2-9xy^2z^2 =-3xyz(-y-2xz+3yz) =3xyz(2xz+y-3yz) 3.x^2-6x+9 =(x-3)^2 4.x^2-36 =(x+6)(x-6)
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中二數學問題求幫忙(15點)發問:
Manipulations and Factorization of Polynomials Simplify 1.(5a^3-a)+(6a^2-7a+1)-(2a^3+4a-1) 2.(3a+1)(a-2) 3.(2x^2-3x+1)(x^2-x-1) Factorize 1.3a^2b-6ab^2 2.-3xy^2z+6x^2yz^2-9xy^2z^2 3.x^2-6x+9 4.x^2-36 睇吾明可以問 知道答案的plz help!!!
最佳解答:
Simplify 1.(5a^3-a)+(6a^2-7a+1)-(2a^3+4a-1) =5a^3-a+6a^2-7a+1-2a^3-4a+1 =3a^3+6a^2-12a+2 2.(3a+1)(a-2) =3a^2-6a+a-2 =3a^2-5a-2 3.(2x^2-3x+1)(x^2-x-1) =2x^4-2x^3-2x^2-3x^3+3x^2+3x+x^2-x-1 =2x^4-5x^3+2x^2-2x-1 Factorize 1.3a^2b-6ab^2 =3ab(a-2b) 2.-3xy^2z+6x^2yz^2-9xy^2z^2 =-3xyz(-y-2xz+3yz) =3xyz(2xz+y-3yz) 3.x^2-6x+9 =(x-3)^2 4.x^2-36 =(x+6)(x-6)
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