74
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2.5 + 24 = 26.5
49x²+70x+25 = (7x+5)² since the root (-70/(2*49)) of the quadratic equations is -5/7 (discriminant = 70²-4*49*25 = 0)
To calculate the sum of 49 plus 49 plus 49 plus 49 plus 49, you would multiply 49 by 5, which equals 245. This is because addition is a form of repeated multiplication. So, 49 multiplied by 5 is 245.
658
49 + 66 + 132 + 31 = 278