Question

Factorize :
X³+7x+12 ,x²-12x+20

Answer 1

= x² - x(10 + 2) + 20

= x² - 10x - 2x + 20

= x(x - 10) -2(x - 10)

= (x - 10) (x - 2)

Answer 2

Solution :-

Case 1

→ x² + 7x + 12

→ x² + 4x + 3x + 12

→ x ( x + 4 ) + 3 ( x + 4 )

→ ( x + 3 ) ( x + 4 )

Case 2

→ x² - 12x + 20

→ x² - 10x - 2x + 20

→ x ( x - 10 ) - 2 ( x - 10 )

→ ( x - 2 ) ( x - 10 )