Answer:
x=2 or x=5/2
Step-by-step 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
