急……Quadratic Equations
1) Solve the following equations by factorization.
x2+1=(25/12)x
2) Solve the following equations by completing the square.
(1/4)x2+x-3=0
急……Quadratic Equations
2008-10-02 4:22 am
回答 (3)
2008-10-02 4:33 am
2008-10-03 12:02 am
2. by completing the square
(1/4)x^2+x-3=0
x^2+4x-12=0
x^2+4x+4-16=0
(x+2)^2-4^2=0
(x+6)(x-2)=0
x=-6 or 2
(1/4)x^2+x-3=0
x^2+4x-12=0
x^2+4x+4-16=0
(x+2)^2-4^2=0
(x+6)(x-2)=0
x=-6 or 2
2008-10-02 7:07 am
1. x2+1=(25/12)x
12x2+12=25x
12X2-25X+12=0
(4X-3)(3x-4)=0
X=3/4 or X=4/3
2.(1/4)x2+x-3=0
X2+4x-12=0
(X+6)(X-2)=0
X=-6 or x=2
12x2+12=25x
12X2-25X+12=0
(4X-3)(3x-4)=0
X=3/4 or X=4/3
2.(1/4)x2+x-3=0
X2+4x-12=0
(X+6)(X-2)=0
X=-6 or x=2
收錄日期: 2021-04-20 19:49:04
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