The Formal Method:
(5)2 + (10)2 = (5)2 + (2 x 5)2 = (5)2 + (2)2(5)2 = 52 ( 1 + 4) = 52 (5) = (25) (5) = 125
The Easy Method:
52 = 25
102 = 100
52 + 102 = 25 + 100 = 125 .
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7 + 90 / 9 + 10 + 42 - 7 7 + 10 + 10 + 16 - 7 36
10
(5.9x^3 + 3.4x^2 - 7) - (2.9x^3 - 9.6x^2 + 3) = 3x^3 +13x^2 -10
16 plus 10 plus 8 plus 6 plus 2 is equal to 42.
It is: 3^2 plus 2^3 = 17 meaning 9 plus 8 = 17