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user100 [1]
4 years ago
5

HELP GEOMETRY find x with both questions

Mathematics
1 answer:
Bogdan [553]4 years ago
6 0

x(6 + x) = 5 \times 8 \\  {x}^{2}  + 6x - 40 = 0 \\ (x + 10)(x - 4) = 0 \\ x = 4
4(x + 4) = 64 \\ x + 4 = 16 \\ x = 12
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