用配方法将下列二次项式化为(x+h)²+k的形式,(k,h为常数) (1)x²-6x+12 (2)x²+3x+2
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用配方法将下列二次项式化为(x+h)²+k的形式,(k,h为常数) (1)x²-6x+12 (2)x²+3x+2
用配方法将下列二次项式化为(x+h)²+k的形式,(k,h为常数) (1)x²-6x+12 (2)x²+3x+2
用配方法将下列二次项式化为(x+h)²+k的形式,(k,h为常数) (1)x²-6x+12 (2)x²+3x+2
x²-6x+12
=x^2-6x+9+3
=(x-3)^2+3
2.x^2+3x+2
=x^2+3x+(3/2)^2-9/4+2
=(x+3/2)^2-1/4