Answer:
Step-by-step explanation:
To factorise, first we remove as the highest common factor, which in this case, is 5.
45a + 35
5 (9a +7)
When removing a value from the equation, we have to make sure that we divide the terms we're removing the number from as well, to ensure that the equation stays the same, and that we haven't changed it's value.
Hope this helps,
Cate
