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liraira [26]
3 years ago
13

What is the solution for x^2-4x=?

Mathematics
1 answer:
Aneli [31]3 years ago
6 0

Answer:

Step-by-step explanation:

18^{x^{2}+4x+4} = 18^{9x+18}\\

Compare the powers

x² + 4x + 4 = 9x + 18

x² + 4x + 4 - 9x -18 = 0

x² -5x -14 = 0

x² -7x + 2x - 2 *7 = 0

x(x-7) + 2(x - 7) = 0

(x-7)(x+2) = 0

x - 7 = 0    or x + 2 = 0

x = 7         or x = -2

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