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Q: The square root of 16x plus 80 then -1?

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x2+16x-80 = 0 (x-4)(x+20) = 0 x = 4 or x = -20

Square root of 81

√80 = 8.94427191

square root of 125/80 = 1.25 or 5/4

16

√6400 = 80* * * * *OR -80

No, the square root of 6400 is 80, and 3200 squared is 10240000.

Thr square root of 80656 is 284

i8.94427191

80

To factorise x3 + 5x2 - 16x - 80 I note that -80 = 5 x -16 and 5 & -16 are the coefficients of x2 and x. Thus I have: x3 + 5x2 - 16x - 80 = (x + 5)(x2 - 16) and the second term is a difference of 2 squares, meaning I have: x3 + 5x2 - 16x - 80 = (x + 5)(x + 4)(x - 4)

6400 = 80*80

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