Question

FACTORISE:- x cube -2x square + 4x + 20​

Answer 1

Answer:

x³- 2x²+ 4x +20

➡ (x³ -2x²+ 4x) +20 = 0

➡ x (x² -2x +4) +20 = 0

➡ x²-2x +4 +20 = 0

➡x²-2x +24 = 0

➡ x² +4x - 6x +24 =0

➡ x( x + 4 ) -6 ( x + 4 ) = 0

➡ ( x + 4 ) ( x - 6 ) = 0

➡ x = -4 & 6