PLease write steps!
Find the values of A and B
1. 3x2+4x = Ax2+Bx
2. 5(3x-2) = Ax-B
3. 2(x-A) = Bx-2
4 6(x2+1)+ A = Bx2 + 8
Maths Form2
2007-09-09 6:56 pm
回答 (5)
2007-09-09 7:03 pm
✔ 最佳答案
1.a=3,b=4 (一睇就知)2.5(3x-2) = Ax-B
15x-10=Ax-B
A=15 B=10
3.2(x-A) = Bx-2
2x-2A = Bx-2
A=1 B=2
4 .6(x2+1)+ A = Bx2 + 8
12x+6 + A = 2Bx + 8
x=12/2 A=8
=6
2007-09-09 11:04:03 補充：
4 .6(x2 1) A = Bx2 812x 6 A = 2Bx 8*B*=12/2 A=8=6
參考: me
2007-09-09 7:11 pm
１．ａ＝３，ｂ＝４
２．ａ＝１５，ｂ＝１０
３．ａ＝１，ｂ＝２
４．ａ＝８，ｂ＝９
無咩steps架其實只要ｓｕｂ落去就得
２．ａ＝１５，ｂ＝１０
３．ａ＝１，ｂ＝２
４．ａ＝８，ｂ＝９
無咩steps架其實只要ｓｕｂ落去就得
2007-09-09 7:06 pm
1.3=A, B=4
2.5(3x-2)=Ax-B
15x-10=Ax-B
15=A,10=B
3.2(x-A) = Bx-2
2x-2A = Bx-2
2=B,A=1
4.6(x2+1)+ A = Bx2 + 8
6x2+6+A = Bx2 + 8
6=B,8=A
2.5(3x-2)=Ax-B
15x-10=Ax-B
15=A,10=B
3.2(x-A) = Bx-2
2x-2A = Bx-2
2=B,A=1
4.6(x2+1)+ A = Bx2 + 8
6x2+6+A = Bx2 + 8
6=B,8=A
參考: sorry~~我just記得咁多
2007-09-09 7:02 pm
1. 3x^2+4x = Ax^2+Bx
A=3 , B=4//
2. 5(3x-2) = Ax-B
15x-10=Ax-B
A=15 , B=10//
3. 2(x-A) = Bx-2
2x-2A=Bx-2
B=2 , A= 2/2=1//
4 6(x^2+1)+ A = Bx^2 + 8
6x^2+6+A=Bx^2+8
6x^2-2=Bx^2-A
B=6 , A=2//
A=3 , B=4//
2. 5(3x-2) = Ax-B
15x-10=Ax-B
A=15 , B=10//
3. 2(x-A) = Bx-2
2x-2A=Bx-2
B=2 , A= 2/2=1//
4 6(x^2+1)+ A = Bx^2 + 8
6x^2+6+A=Bx^2+8
6x^2-2=Bx^2-A
B=6 , A=2//
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