phân tích thành nhân tử ak?

\(a,2x^3+5x^2+5x+3\)

\(=2x^3+3x^2+2x^2+3x+2x+3\)

\(=x^2\left(2x+3\right)+x\left(2x+3\right)+\left(2x+3\right)\)

\(=\left(2x+3\right)\left(x^2+x+1\right)\)

b) = 4x^3 - 3x^2 + 4x^2 - 3x + 4x - 3

= x^2(4x-3) + x(4x - 3) + 4x - 3

= (4x - 3)(x^2 + x + 1)

c) = 5x^3 - 2x^2 - 10x^2 + 4x + 10x - 4

= x^2(5x - 2) - 2x(5x - 2) + 2(5x - 2)

= (5x - 2)(x^2 - 2x + 2)

d)= 6x^3 - 4x^2 - 3x^2 + 2x + 3x - 2

= 2x^2(3x - 2) - x(3x - 2) + (3x - 2)

= (3x-2)(2x^2-x+1)

e) = 3x^3 - 2x^2 + 21x^2 - 14x + 18x - 12

= x^2( 3x - 2) + 7x(3x - 2) + 6(3x - 2)

= (3x - 2)(x^2 + 7x + 6)

= (3x - 2)(x+1)(x+6)

Đề yêu cầu gì em?

\(x^2-5x+6=\left(x-2\right)\left(x-3\right)\)

\(x^2-7x+12=\left(x-2\right)\left(x-5\right)\)

\(x^2+x-12=\left(x-5\right)\left(x+6\right)\)

\(x^2-9x+20=\left(x-4\right)\left(x-5\right)\)

\(2x^2-3x+2=2\left(x+\dfrac{1}{2}\right)\left(x-2\right)\)

\(4x^2-7x-2=4\left(x-2\right)\left(x+\dfrac{1}{4}\right)\)

\(4x^2+15x+9=4\left(x+\dfrac{3}{4}\right)\left(x+3\right)\)

1) \(x^2-6x+3\)

\(=x^2-6x+9-6\)

\(=\left(x-3\right)^2-6\)

\(=\left(x-3+\sqrt{6}\right)\left(x-3-\sqrt{6}\right)\)

2) \(2m^2+10m+8\)

\(=2m^2+2m+8m+8\)

\(=2m\left(m+1\right)+8\left(m+1\right)\)

\(=\left(2m+8\right)\left(m+1\right)\)

\(=2\left(m+4\right)\left(m+1\right)\)

3) \(9x^2+6x-8\)

\(=\left(9x^2+6x+1\right)-9\)

\(=\left(3x+1\right)^2-9\)

\(=\left(3x+4\right)\left(3x-2\right)\)

4) \(x^3-5x^2-14x\)

\(=x\left(x^2-5x-14\right)\)

\(=x\left(x^2-2x+7x-14\right)\)

\(=x\left[x\left(x-2\right)+7\left(x-2\right)\right]\)

\(=x\left(x+7\right)\left(x-2\right)\)

1) x^2-6x+3

= (x^2-6x+9)-6

=(x-3)^2-6

=(x-3-căn 6)(x-3+căn 6)

2) =2(m^2+5m+4)

=2(m+1)(m+4)

3) =9x^2+6x+1-9

=(3x+1)^-9

=(3x-2)(3x+4)

4, x^3-5x^2-14x

=x(x-7)(x+2)

5, a^4+4a^2-5

=a^4+4a^2+4-9

=(a^2+2)^-9

=(a^2-1)(a^2+5)

6, x^3-7x-6

=(x-3)(x+1)(x+2).

5) \(a^4+4a^2-5\)

\(=a^4+5a^2-a^2-5\)

\(=a^2\left(a^2+5\right)-\left(a^2+5\right)\)

\(=\left(a^2-1\right)\left(a^2+5\right)\)

\(=\left(a+1\right)\left(a-1\right)\left(a^2+5\right)\)

6) \(x^3-7x-6\)

\(=x^3-x-6x-6\)

\(=x\left(x^2-1\right)-6\left(x+1\right)\)

\(=x\left(x-1\right)\left(x+1\right)-6\left(x+1\right)\)

\(=\left(x+1\right)\left(x^2-x-6\right)\)

\(=\left(x+1\right)\left(x^2+2x-3x-6\right)\)

\(=\left(x+1\right)\left[x\left(x+2\right)-3\left(x+2\right)\right]\)

\(=\left(x+1\right)\left(x+2\right)\left(x-3\right)\)

3x² + 10x +3

=> 3x² + 9x +x +3

=> (3x² +x )+ ( 9x +3)

=> x(3x +1) +3( 3x+1)

=>(3x+1) (x+3)

Tự làm tiếp nhé

a, ta có: 3x^2 +10x+3= 3x^2 + 9x +x +3 = 3x(x+3)+(x+3)=(x+3)+(3x+1)

2 câu còn lại đang trong qtrinhf suy nghĩ

a) \(3x^2+10x+3=3x^2+9x+x+3\)

\(=3x\left(x+3\right)+\left(x+3\right)\)

\(=\left(x+3\right)\left(3x+1\right)\)

b)\(5x^2+14x-3=5x^2+15x-x-3\)

\(=5x\left(x+3\right)-\left(x+3\right)\)

\(=\left(5x-1\right)\left(x+3\right)\)

c)\(6x^2+7x-3=6x^2+9x-2x-3\)

\(=3x\left(2x+3\right)-\left(2x+3\right)\)

\(=\left(3x-1\right)\left(2x+3\right)\)

b) 3x⁴-3x³+9x³-9x²-24x²+24x-48x+48

=3x³(x-1)+9x²(x-1)-24x(x-1)-48(x-1)

=(x-1)(3x³+9x²-24x-48)

=3(x-1)(x³+3x²-8x-16)

một đòn bẫy dài một mét .đặt ở đâu để có thể dùng 3600n có thể nâng tảng đá nặng 120kg?

4: \(3x^3-5x^2+5x-2\)

\(=3x^3-2x^2-3x^2+2x+3x-2\)

\(=x^2\left(3x-2\right)-x\left(3x-2\right)+\left(3x-2\right)\)

\(=\left(3x-2\right)\left(x^2-x+1\right)\)

5: \(5x^3-12x^2+14x-4\)

\(=5x^3-2x^2-10x^2+4x+10x-4\)

\(=\left(5x-2\right)\left(x^2-2x+2\right)\)

c​âu c:x^4-2x^3-x^2+x^3-2x^2-x+5x^2-10x-5=x^2(x^2-2x-1)+x(x^2-2x-1)+5(x^2-2x-1)=(x^2-2x-1)(x^2+x+5)

​

​