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受欢迎的代数 >

3x^2+(2-ab)x=3(x-b)^2

解答

3 x^{2} + (2 - ab) x = 3 (x - b)^{2}

解答

x = \frac{3 b ^{2}}{- ab + 6 b + 2}; a \neq = - \frac{- 6 b - 2}{b}

求解步骤

3 x^{2} + (2 - ab) x = 3 (x - b)^{2}

展开

3 x^{2} + (2 - ab) x : 3 x^{2} + 2 x - ab x

展开

3 (x - b)^{2} : 3 x^{2} - 6 b x + 3 b^{2}

3 x^{2} + 2 x - ab x = 3 x^{2} - 6 b x + 3 b^{2}

两边减去

3 x^{2} - 6 b x

3 x^{2} + 2 x - ab x - (3 x^{2} - 6 b x) = 3 x^{2} - 6 b x + 3 b^{2} - (3 x^{2} - 6 b x)

化简

- ab x + 6 b x + 2 x = 3 b^{2}

分解

- ab x + 6 b x + 2 x : x (- ab + 6 b + 2)

x (- ab + 6 b + 2) = 3 b^{2}

两边除以

- ab + 6 b + 2; a \neq = - \frac{- 6 b - 2}{b}

x = \frac{3 b ^{2}}{- ab + 6 b + 2}; a \neq = - \frac{- 6 b - 2}{b}

作图

流行的例子

x + 7 = 4^{3}

6 (2 x + 2) = - 24

log_{9}(1)=3x-18

lo g_{9} (1) = 3 x - 18

solvefor x,y-1=-3(x+2)

so l v e f or x, y - 1 = - 3 (x + 2)

solvefor g,f= g/h

so l v e f or g, f = \frac{g}{h}