Answer:
see explanation
Step-by-step explanation:
We can check their factorising by expanding the factors using FOIL
(2x - 4)(x + 5)
= 2x² + 10x - 4x - 20 ← collect like terms
= 2x² + 6x - 20 ← correct
and
(x - 2)(2x + 10)
= 2x² + 10x - 4x - 20 ← collect like terms
= 2x² + 6x - 20 ← correct
However both omitted to factor out 2 as a common factor
Given
2x² + 6x - 20 ← factor out 2 from each term
= 2(x² + 3x - 10)
= 2(x + 5)(x - 2) ← in fully factored form
