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1 )
=x3-2x2+6x2-12x+5x-10
=x2(x-2)+6x(x-2)+5(x-2)
=(x-2)(x2+6x+5)
=(x-2)(x2+x+5x+5)
=(x-2)[x(x+1)+5(x+1)]
=(x-2)(x+1)(x+5)
toàn mũ lớn hơn 3 khó làm quá!!!! >.<
653645645645645676746784734746856876897684737547
x2-7x+12
=x2-3x-4x+12
=x(x-3)-4(x-3)
=(x-3)(x-4)
x4-4x2+4x-1
=x4-1-4x2+4x
=(x2-1)(x2+1)-4x(x-1)
=(x-1)(x+1)(x2+1)-4x(x-1)
=(x-1)[(x+1)(x2+1)-4x]
=(x-1)(x3+x2+x+1-4x)
=(x-1)(x3+x2-3x+1)
6x4-11x2+3
=6x4-2x2-9x2+3
=2x2(3x2-1)-3(3x2-1)
=(3x2-1)(2x2-3)
a x2 - 7x - 6 = x2 -6x-x-6
= x(x-6)+(x-6)
= (x+1)(x+6)
b x3 + 4x2 - 7x -10
=x3 - 2x2 + 6x2 -12x+5x-10
= x2(x-2) + 6x(x-2) + 5(x-2)
= (x2 +6x+5)(x-2)
=(x2 +x+5x+5)(x-2)
=[x(x+1)+5(x+1)](x-2)
=(x+5)(x+1)(x-2)
c x3 +x2-2
=x3-x2+2x2-2x+2x-2
=x2(x-1)+2x(x-1)+2(x-1)
=(x2+2x+2)(x-1)
d x2 +5x+6
=x2 +2x+3x+6
=x(x+2)+3(x+2)
=(x+3)(x-2)
Con 1 y e nhung luoi lam
mk chỉnh lại đề
\(x^2-7x+6\)
\(=x^2-x-6x+6\)
\(=x\left(x-1\right)-6\left(x-1\right)\)
\(=\left(x-1\right)\left(x-6\right)\)
\(a^2-6a+5=\left(a^2-5a\right)-\left(a-5\right)=a\left(a-5\right)-\left(a-5\right)=\left(a-1\right)\left(a-5\right)\)
\(a^2-7a+12=\left(a^2-3a\right)-\left(4a-12\right)=a\left(a-3\right)-4\left(a-3\right)=\left(a-4\right)\left(a-3\right)\)
\(4a^2+4a-3=4a^2-2a+\left(6a-3\right)=2a\left(2a-1\right)+3\left(2a-1\right)=\left(2a+3\right)\left(2a-1\right)\)
X2 - 6x + 5
= x2 - 6x + 5 + 4 - 4
= x2 - 6x + 9 - 22
= ( x - 3 )2 - 22
= ( x - 3 - 2 ) ( x - 3 + 2 )
(x^2-4x)^2 + (x-2)^2-10
{x^2-(2x)^2}+(x-2)-5^2
{x\(^2\)- (2x)\(^2\)} {x\(^2\)+ (2x)\(^2\)}+{(x-2) - 5\(^2\)} {(x-2)+5\(^2\)}
đén đây bn tự lm típ
a,\(=x^3-x^2+5x^2-5x-24x+24\)
\(=x^2\left(x-1\right)+5x\left(x-1\right)-24\left(x-1\right)\)
\(=\left(x-1\right)\left(x^2+5x-24\right)\)
\(=\left(x-1\right)\left(x^2-3x+8x-24\right)\)
\(=\left(x-1\right)\left(x\left(x-3\right)+8\left(x-3\right)\right)\)
\(=\left(x-1\right)\left(x-3\right)\left(x+8\right)\)