Question

Answer 1

bạn chia nhỏ \(1->2\) ý để có thể nhận đc sự trợ giúp nhanh nhất nha

Answer 2

Bài 1: 

a: =(x-2)(x-3)

b: \(=3\left(x^2+3x-10\right)=3\left(x+5\right)\left(x-2\right)\)

c: =(x-1)(x-2)

d: \(=\left(x-3\right)\left(x-6\right)\)

e: =(x-2)(x-4)

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

g: =(x+5)(x+1)

Answer 3

a) x² - 5x + 6

= x² - 6x + x - 6

= (x² - 6x) + (x - 6)

= x(x - 6) + (x - 6)

= (x - 6)(x + 1)

b) 3x² + 9x - 30

= 3x² - 6x + 15x - 30

= (3x² - 6x) + (15x - 30)

= 3x(x - 2) + 15(x - 2)

= (x - 2)(3x + 15)

= 3(x - 2)(x + 5)

Answer 4

c) x² - 3x + 2

= x² - x - 2x + 2

= (x² - x) + (-2x + 2)

= x(x - 1) - 2(x - 1)

= (x - 1)(x - 2)

d) x² - 9x + 18

= x² - 3x - 6x + 18

= (x² - 3x) + (-6x + 18)

= x(x - 3) - 6(x - 3)

= (x - 3)(x - 6)

Answer 5

e) x² - 6x + 8

= x² - 2x - 4x + 8

= (x² - 2x) + (-4x + 8)

= x(x - 2) - 4(x - 2)

= (x - 2)(x - 4)

f) x² - 5x - 14

= x² - 7x + 2x - 14

= (x² - 7x) + (2x - 14)

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

= (x - 7)(x + 2)

Answer 6

g) x² + 6x + 5

= x² + x + 5x + 5

= (x² + x) + (5x + 5)

= x(x + 1) + 5(x + 1)

= (x + 1)(x + 5)

h) x² - 7x + 12

= x² - 3x - 4x + 12

= (x² - 3x) + (-4x + 12)

= x(x - 3) - 4(x - 3)

= (x - 3)(x - 4)

i) x² - 7x + 10

= x² - 2x - 5x + 10

= (x² - 2x) + (-5x + 10)

= x(x - 2) - 5(x - 2)

= (x - 2)(x - 5)