Multiply (a-b) by (2b-a).
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-2b(a) - a^2 -2b^2

Step-by-step explanation:

Just use the 'foil' method, meaning that you multiply the first number of one part (a), to the first and second to the next part (2b, -a)

Then, multiply the second number of that part (-b), to the first and to the next part (2b, -a)

You would get: -2b(a) - a^2 -2b^2

answer is in the picture

you never say the total so we cant find the percentage used for petrol

step-by-step explanation:

hreryryrranswer:

step-by-step explanation: