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A^2−8ab+16b^2=81, find a–4b
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A^2−8ab+16b^2=81, find a–4b

User Bilbo Baggins
by
7.4k points

1 Answer

1 vote

Answer:

-9, 9

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.

User Luis Herrera
by
7.9k points
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