It is -10.
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18 because, 5x2=10 10+8=18! Your welcome. It's not a problem at all. I love math!
If the question is writen out "10-5x2+8/2=" then with the correct order of operations it would be "10-(5x2)+(8/2)=". This simplifies to "10-10-+4=". Finally, this comes to "4"
10 + 40 = 5050 / (5x2) = 50/1050/10 = 5
(5x - 1)(x + 3)5x2 + 14x - 3= 5x2 + 15x - x - 3= 5x(x + 3) - 1(x + 3)= (5x - 1)(x + 3)
5x2 + 15 is the same as 10x+15 factor out a 5 since both the 10 and 15 are divisible by 5 now you have... 5(2x+3) and that's your answer