在GMAT数学答题中,我们往往要用到一些简单的GMAT数学公式,整理了一些GMAT数学公式。 (a+b)(a-b)=a-b (a+b)=a+2ab+b (a-b)=a-2ab+b (a+b)=a+3ab+3ab+b (a-b)=a-3ab+3ab-b 一元二次方程ax+bx+c=0的解x,=(-bb-4ac)/2a *Simple Interest:利息Interest=本金Principal时间Time利率Rate。 *Compound Interest:A=(1+R)n;A为本利和,P为本金,R为利率,n为期数。 *Discount=CostRate of Discount *Distance=SpeedTime *Pythagorean Theorem(勾股定理):直角三角形(right triangle)两直角边(legs)的平方和等于斜边 (hypotenuse)的平方。 *多变形的内角和:(n-2)180,总对角线数为n(n-3)/2条,从每一个顶点引出的对角线数为(n-3)条;式中:n为多边形的边数
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