25 - 5 + 2 = 22
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x2 + 10 x + 25 = 2 (x+5)2 = 2 x+5 = +/- sqrt(2) x = -5 +/- sqrt(2)
Just realize that multiplication is repeated addition. So you have 6 twos and 5 fives. that is 12+25 and now add 55 The total is 92
5 + 20 = 25
You take 4 times 5 which is 20 then 3 plus 2 which is 5. Add 20 plus 5 and you get 25. That's the answer.
If you mean 2(x+5) + (3*5) then it can be simplified to: 2x+25