a, k ph đc
b,Đặt \(A=...=\left(x+1\right)\left(x+4\right)\left(x+2\right)\left(x+3\right)-24=\left(x^2+5x+4\right)\left(x^2+5x+6\right)-24\)
Đặt x^2+5x+4=t,ta có:
\(A=t\left(t+2\right)-24=t^2+2t-24=t^2-4t+6t-24=t\left(t-4\right)+6\left(t-4\right)=\left(t-4\right)\left(t+6\right)\)
\(=\left(x^2+5x+4-4\right)\left(x^2+5x+4+6\right)=x\left(x+5\right)\left(x^2+5x+10\right)\)
PHAN TICH x^7+x^5+x^4+x^3+x^2+1 THANH CAC NHAN TU
phan tich thanh nhan tu
a x^8+x^6+x^4+x^2+1
b x^9-x^7-x^6-x^5+x^4+x^3+x^2+1
phan tich thanh nhan tu
1)x^4+6*x^3+7*x^2-6*x=1
2)x^3+4*x^2-29*x+24
x7+x5+x4+x3+x2+1 phan tich da thuc thanh nhan tu
phan tich da thuc sau thanh nhan tu (x-1)(x-3)(x-5)(x-7)-20
phan tich da thuc thanh nhan tu
a)(x^2-x+1)^2-8x^2-4x+1
b)x^5-x^4-x^3-x^2-x-2
phan tich da thuc thanh nhan tu (x+1)(x+2)(x+4)(x+5)-40
b)2x3+3x2+6x+5
c)x4-4x3-19x7+106x-120
phan tich da thuc thanh nhan tu (x+1)(x+2)(x+4)(x+5)-40
b)2x3+3x2+6x+5
c)x4-4x3-19x7+106x-120
phan tich da thuc thanh nhan tu
a) x^7+x^2+1
b) x^8+x+7
c) x^8+3x^4+1
d) x^10+x^5+1
