Answer:
(3x - 5)(x - 6).
Explanation:
In order to factor this quadratic, we can use the method of grouping. First, we need to find two numbers that add up to 23 and multiply to 90. The two numbers 18 and 5 satisfy both of these conditions,
since 18 + 5= 23 and 18*5
We can then factor the quadratic as follows:

we can write it as:

Opening bracket

Taking common from each two terms

Taking common and keeping remaining in bracket

Therefore, the quadratic of
can be factored as (3x - 5)(x - 6).