Square root(40) = 6.3
6.3 + 9 = 15.3
Unless you mean it this way (square root of 49):
Square root(49) = 7.0
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x²+6x+9=49 x²+6x-40=0 x1=-6/2 - Square root of ((6/2)²+40) x1=-3 - 7 x1= -10 x2=-6/2 + Square root of ((6/2)²+40) x2=-3 + 7 x2= 4
The square root of 9 is 3, and the square root of 16 is 4. Adding these together, 3 + 4 equals 7. Therefore, the square root of 9 plus 16 is 7.
Plus or minus 3i.
well, the square root of 81 is 9, and seven squared is 49, so it wud be 40
3 is the square root of 9