wanderspamlust wanderspamlust

26-03-2020
Mathematics

contestada

a^2−8ab+16b^2=81, find a–4b

Respuesta :

meowdolgov meowdolgov

01-04-2020

Answer:

-9, 9

Step-by-step explanation:

a² − 8ab + 16b² = 81

(a - 4b)² = 81 Wrote the left-hand side as a square

a - 4b = ±9 Took the square root of each side

All values of a - 4b are -9 and +9.

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