How do you write y + 6 = (-3/4)(x + 8) in slope-intercept form? How do you write the slope-intercept form of 2x - 3y = -6? Put the following equation in slope intercept form. x - 4y = -20 Write the slope-intercept form (y = mx + b) of the equation of the line that...
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निकाले जिसका केन्द्र रेखाओं x+y+1=0 तथा x-2y+4=0 का प्रतिच्छेद बिन्दु है। by Maths experts to help you in doubts & scoring excellent marks in Class ...
答案见上7.(1)6 4 7(2) \(x=9y=4. , 【解析】 (1)将x= a,y=2代入2x-3y=6, 得2a-6=6,所以a=6. 将x=9,y=b代入2x-3y=6, 得18-3b=6,所以b=4. \(x=9y=4. 。 \(x=1,y=36. x=9, 分别代入 mx+ny=40 , y=4 \(9m+4n=40m+36n=40. ,①得 ,②①*9 ,得 81m+3...
分别代入mx+ny=40 \(9m+4n=40m+36n=40. ,① m+36n=40, ②①*9 ,得81m+36n=360, ③③ ③-② ,得80m=320,所以m=4 将m=4代入①,得n=1, 所以原方程为4x+y=40. 将x=c,y=12代入4x+y=40. 得4c+12=40,所以c=7. ① (2)由(1)可得 \(4x+y=40,2x-3y=6,. ②①*3 ,得12x...
在2x - 3y - mx + 5y的平方中不含x,那么系数m必须为0。根据给定条件,我们可以整理表达式:(2x - 3y - mx + 5y)² = (2x + 2y - mx)²展开平方后,我们可以看到只有x²、y²和xy的项:4x² + 4y² + m²x² + 4xy - 4mx²...
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方程组无解,则两个方程中X、Y的系数对应成比例,但常数不成比例 因此2/M=-1/3 M=-6 此时常数比值为1/2,不等于-1/3 方程组无解
【答案】B【解析】(2x+3ymx-ny)=2mx2-2nxy+3mxy-3ny2=9y2-4x2,.2m=-4,3n=9,2n+3m=0,解得m=-2,n =-3。故选:B。 先把等式左边利用多项式乘多项式的法则展开并整理,根据对应项系数相等列出等式,求解即可. 结果二 题目 若,则m、n的值为() A.m=2,n=3 B.m=-2,n=-...
(m-2)x-3y-6=0 ∵ 方程是关于x、y的二元一次方程 ∴ m-2≠ 0,即m≠ 2 故选:D 【二元一次方程的有关概念】 、概念:含有两个未知数,并且含未知数项的次数为的整式方程叫做二元一次方程. 、一般形式:. 【二元一次方程概念的理解】 1、方程中含有两个未知数,即未知数的系数不能为. 2、含有...