Fives everywhere

Algebra Level 2

The equation (5×5×5×x)=2(5+5+5+x)2 (5 \times 5 \times 5 \times x) = 2(5 + 5 + 5 + x)^{2} has two solutions. If we call them a and b, find a×b a \times b .

Denton Young by Denton Young
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