How do you factor #8x^2 -10xy - 25y^2#?
2 Answers
Explanation:
Let,
When you multiply a and c together you get , -200
You then need to find two numbers that when you multiply them you get -200 and when you add them you get -10.
Those two numbers are, -20 and 10
From there,
Break the expression into groups
Factorise further
The factors are
Explanation:
Find factors of
There is often some trial and error, but with practice you will get better at this.
These are the correct factors, now find the correct signs.
The signs need to be different to give
The factors are