Question

Please factorise: 4x^2-18x+20​

Answer 1

x=2 or x=5/2

Explanation:

4x^2 -(10+8)x +20

4x^2 -10 x - 8x +20

2x(2x-5)-4(2x-5)

(2x-5)(2x-4)

so

2x-5=0

x=5/2

or

2x-4=0

x=2