a+b=3(a-b)=2a/b
Tìma,b?
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a: \(=a^2-b^4\)
b: \(=\left(a^2+2a\right)^2-9\)
c: \(=a^2-\left(2a+3\right)^2\)
d: \(=a^4-\left(2a-3\right)^2\)
e: \(=\left(-a^2-2a+3\right)^2\)
g: \(=4a^2-a^4\)
a, \(\left(a-b\right)\left(b-a\right)y+a-b\)
\(=\left(a-b\right)\left(by-ay+1\right)\)
b, \(\left(x-y+z\right)\left(a+y-x-z\right)b-x+y-z\)
\(=\left(x-y+z\right)\left(a+y-x-z\right)b-\left(x-y+z\right)\)
\(=\left(x-y+z\right)\left(ab+yb-xb-xz-1\right)\)
c, \(\left(2a+3\right)x-\left(2a+3\right)y+2a+3\)
\(=\left(2a+3\right)\left(x-y\right)+\left(2a+3\right)\)
\(=\left(2a+3\right)\left(x-y+1\right)\)
d, \(\left(a-b\right)x+\left(b-a\right)y-a+b\)
\(=\left(a-b\right)x-\left(a-b\right)y-\left(a-b\right)\)
\(=\left(a-b\right)\left(x-y-1\right)\)
a. (a-b)(b-a)y+a-b=(a-b)[(b-a)y+1]
b. (x-y+z)(a+y-x-z)b-x+y-z=(x-y+z)(a-y-x-z)b-(x-y+z)=(x-y+z)[(a-y-x-z)b-1]
c. (2a+3)x-(2a+3)y+2a+3=(2a+3)(x-y+1)
d. (a-b)x+(b-a)y-a+b=(a-b)x-(a-b)y-(a-b)=(a-b)(x-y-1)
a: \(=-y\left(a-b\right)^2+\left(a-b\right)\)
\(=\left(a-b\right)\left(-ya+yb+1\right)\)
b: \(=\left(x-y+z\right)\left(a+y-x-z\right)\cdot b-\left(x-y+z\right)\)
\(=\left(x-y+z\right)\left(ab-yb-xb-zb-1\right)\)
c: \(\left(2a+3\right)\cdot x-\left(2a+3\right)\cdot y+2a+3\)
\(=\left(2a+3\right)\left(x-y+1\right)\)
d: \(=\left(a-b\right)\cdot x-\left(a-b\right)\cdot y-\left(a-b\right)\)
\(=\left(a-b\right)\left(x-y-1\right)\)
a) A=(4-5x)2-(3+5x)2=(4-5x-3-5x)(4-5x+3+5x)=(-25x+1)1=-25x+1
B=(3x-1)(1+3x)-(3x+1)2=9x2-1-(3x+1)2=9x2-1-(9x2+6x+1)=9x2-1-9x2-6x-1=-6x-2=-2(3x+1)
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