x^4+x^3-9x^2+10x-8 phan tich da thuc thanh nhan tu
phan tich da thuc thanh nhan tu a. x^3+x+2
b, x^4+5x^3+10x-4
\(x^3+x+2=\left(x^3+1\right)+\left(x+1\right)\)
\(=\left(x+1\right)\left(x^2-x+1\right)+\left(x+1\right)\)
\(=\left(x+1\right)\left(x^2-x+1+1\right)\)
\(=\left(x+1\right)\left(x^2-x+2\right)\)
\(b,x^4+5x^3+10x-4=\left(x^4-4\right)+\left(5x^3-10x\right)\)\(=\left(x^2+2\right)\left(x^2-2\right)+5x\left(x^2+2\right)\)
\(=\left(x^2+2\right)\left(x^2-2+5x\right)\)
phan tich da thuc thanh nhan tu
a)(x^2+10x)(x^2+10x+24+128)
b) (x+2)(x+4)(x+6)(x+8)+16
c) (x^2-11x+28)(x^2+10x+24)-72
phan tich da thuc thanh nhan tu -25x^6-y^8+10x^3y^4
Bạn trình bầy rõ ràng chút đi. Mk chẳng hiểu gì cả.
\(-25x^6-y^8+10x^3y^4\\ =-\left(25x^6-10x^3y^4+y^8\right)\\ =-\left[\left(5x^3\right)^2-2\cdot5x^3\cdot y^4+\left(y^4\right)^2\right]\\ \\ =\left(5x^3-y^4\right)^2\)
phan tich da thuc thanh nhan tu
3x^4-48
x^4-8x
x^3-6x^2+9x
\(3x^4-48\)
\(=\left(3x^4-6x^3\right)+\left(6x^3-12x^2\right)+\left(12x^2-24x\right)+\left(24x-48\right)\)
\(=3x^3\left(x-2\right)+6x^2\left(x-2\right)+12x\left(x-2\right)+24\left(x-2\right)\)
\(=\left(x-2\right)\left[\left(3x^3+6x^2\right)+\left(12x+24\right)\right]\)
\(=\left(x-2\right)\left[3x^2\left(x+2\right)+12\left(x+2\right)\right]\)
\(=\left(x-2\right)\left(x+2\right)\left(3x^2+12\right)\)
\(x^4-8x\)
\(=x\left(x^3-8\right)\)
\(=x\left[\left(x^3-2x^2\right)+\left(2x^2-4x\right)+\left(4x-8\right)\right]\)
\(=x\left[x^2\left(x-2\right)+2x\left(x-2\right)+4\left(x-2\right)\right]\)
\(=x\left(x-2\right)\left(x^2+2x+4\right)\)
\(x^3-6x^2+9x\)
\(=\left(x^3-3x^2\right)-\left(3x^2-9x\right)\)
\(=x^2\left(x-3\right)-3x\left(x-3\right)\)
\(=\left(x-3\right)\left(x^2-3x\right)\)
\(=x\left(x-3\right)\left(x-3\right)\)
Phan tich da thuc sau thanh nhan tu : (x+1)(x+2)(x+3)(x+4)-8
Gợi ý:
Nhóm:\(\left[\left(x+1\right)\left(x+4\right)\right]\left[\left(x+2\right)\left(x+3\right)\right]-8\)
\(=\left(x^2+5x+4\right)\left(x^2+5x+6\right)-8\)
Đặt \(t=x^2+5x+4\) thì biểu thức trở thành:
\(t\left(t+2\right)-8=t^2+2t-8=\left(t-2\right)\left(t+4\right)\)
Rồi bạn làm tiếp, nếu còn phân tích được thì phải phân tích, mình bận rồi.
(x + 1)(x + 2)(x + 3)(x + 4) - 8
= [(x + 1)(x + 4)][(x + 2)(x + 3)] - 8
= (x2 + 4x + x + 4)(x2 + 3x + 2x + 6) - 8
= (x2 + 5x + 4)(x2 + 5x + 6) - 8
Đặt x2 + 5x + 5 = t
⇒ (x2 + 5x + 5 - 1)(x2 + 5x + 5 + 1) - 8 (1)
Thay t = x2 + 5x + 5 vào (1), ta có:
(t - 1)(t + 1) - 8 = t2 - 1 - 8 = t2 - 9
= (t - 3)(t + 3)
⇔ (x2 + 5x + 5 - 3)(x2 + 5x + 5 + 3)
= (x2 + 5x + 2)(x2 + 5x + 8)
Chúc bạn học tốt !!!!!!!!
(x+1)(x+2)(x+3)(x+4)-8
= [(x+1)(x+4)][(x+2)(x+3)]-8
= (x2+4x+x+4)(x2+3x+2x+6)-8
= (x2+5x+5-1)(x2+5x+5+1)-8
= (x2+5x+5)2-12-8
= (x2+5x+5)2-9
= (x2+5x+5) -32
= (x2+5x+5-3)(x2+5x+5+3) {HĐT số 3}
= (x2+5x+2)(x2+5x+8)
phan tich da thuc thanh nhan tu
1. x^3y^3 +x^2y^2+4
2. x^4+y^4+(x+y)^4
3.x^8+x+1
4.x^4+5x^3+10x-4
phan tich da thuc thanh nhan tu
x^2+6x+9
10x-25-x^2
8x^3-1/8
8x^3+12x^2+6xy^2+y^3
\(a,x^2+6x+9\)
\(=\left(x+3\right)^2\)
\(b,10x-25-x^2\)
\(=-\left(x^2-10x+25\right)\)
\(=-\left(x-5\right)^2\)
\(c,8x^3-\frac{1}{8}\)
\(=8x^3-\left(\frac{1}{2}\right)^3\)
\(=\left(8x-\frac{1}{2}\right)\left(64x^2+4x+\frac{1}{4}\right)\)
\(d,8x^3+12x^2+6xy^2+y^3\)
\(=2\left(4x^3+6x^2+3xy^2+\frac{1}{2}y^3\right)\)
hok tốt!
Điệp viên 007 sai c
c, \(8x^3-\frac{1}{8}=\left(2x\right)^3-\left(\frac{1}{2}\right)^3=\left(2x-\frac{1}{2}\right)\left(4x^2+x+\frac{1}{4}\right)\)
( x+2)(x+3)(x-7)(x-8)-144 phan tich da thuc thanh nhan tu
bạn có biết viết dấu ko nếu ko biết mik bảo cho s là sắc f là huyền x là ngã r là hỏi j là nặng
phan tich da thuc thanh nhan tu x^3-5x^2+2x+8