(5x-3)(4x+5) the last step you have to look at the two terms that you are adding together the 4x(5x-3) and the 5(5x-3) and see what is similar. well the whole bracket is the same the 5x-3 so factor that out and collect the other leftover terms so the 4x and the +5 and thats what goes in the second bracket
He would need to answer 13 or 10 depending on if he does them all or not
Answer:
There are 180 milligrams of gold in the alloy
Step-by-step explanation:
because i know
You can download this app called Symbolab but the answer is -144xy^2