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a) 5x2 - 5xy - 3x + 3y
= 5x.(x - y) - 3.(x - y)
= (x - y).(5x - 3)
b) x3 - 2x2 - x + 2
= x2.(x - 2) - (x - 2)
= (x - 2).(x2 - 1)
= (x - 2).(x - 1).(x + 1)
a/ 5x2-5xy-3x+3y
=5x.(x-y)-3(x-y)
=(5x-3).(x-y)
b/ x3-2x2-x+2
=x2.(x-2)-(x-2)
=(x2-1).(x-2)
=(x-1).(x+1).(x-2)
a) \(\left(x-7\right)\left(x+2\right)\)
b) \(\left(2x-3\right)\left(x+2\right)\)
a) 3x2 + 10x + 8
= 3x2 + 6x + 4x + 8
= 3x.(x + 2) + 4.(x + 2)
= (x + 2).(3x + 4)
b) 2x2 + x - 6
= 2x2 + 4x - 3x - 6
= 2x.(x + 2) - 3.(x + 2)
= (x + 2).(2x - 3)
a) \(\left(3x+4\right)\left(x+2\right)\)
b) \(\left(2x-3\right)\left(x+2\right)\)
a/ 16x2 - 4y2 = (4x + 2y)(4x - 2y)
b/ x4 + 1 = (x2 + √2 x + 1)(x2 - √2 x + 1)
a/ 16x2-4y2=(4x)2-(2y)2=(4x+2y)(4x-2y)
b/ x4+1=(x2)2+12=(x2+1)(x2-1)
k minh nha
a2 - 4a + 3
= a2 - a - 3a + 3
= a.(a - 1) - 3.(a - 1)
= (a - 1).(a - 3)
= \(a^2-3a-a+3\)= \(a\left(a-3\right)-\left(a-3\right)\)= \(\left(a-3\right)\left(a-1\right)\)